Papers - INAMI, Kenji

Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic B -Meson Decays at Belle II Reviewed

Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D.M., Atmacan, H., Aushev, T., Aushev, V., Bae, H., Bahinipati, S., Bambade, P., Banerjee, S., Bansal, S., Barrett, M., Baudot, J., Bauer, M., Baur, A., Beaubien, A., Becker, J., Bennett, J.V., Bernieri, E., Bernlochner, F.U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhardwaj, V., Bhuyan, B., Bianchi, F., Bilka, T., Bilokin, S., Biswas, D., Bodrov, D., Borah, J., Bozek, A., Bra?ko, M., Briere, R.A., Browder, T.E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Cerasoli, J., Chang, M.-C., Cheaib, R., Cheema, P., Chekelian, V., Cheon, B.G., Chilikin, K., Chirapatpimol, K., Cho, H.-E., Cho, K., Cho, S.-J., Choi, S.-K., Choudhury, S., Cochran, J., Corona, L., Cunliffe, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S.A., De Nardo, G., De Nuccio, M., De Pietro, G., De Sangro, R., Destefanis, M., Dhamija, R., Di Capua, F., Dingfelder, J., Dole?al, Z., Dong, T.V., Dorigo, M., Dossett, D., Dreyer, S., Dubey, S., Dujany, G., Ecker, P., Eliachevitch, M., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finocchiaro, G., Fodor, A., Forti, F., Frey, A., Fulsom, B.G., Gabrielli, A., Ganiev, E., Garcia-Hern, ez, M., Gaudino, G., Gaur, V., Gaz, A., Gellrich, A., Ghevondyan, G., Giordano, R., Giri, A., Glazov, A., Gobbo, B., Godang, R., Goldenzweig, P., Gradl, W., Grammatico, T., Gr, erath, S., Graziani, E., Gruberov{\'a}, Z., Gu, T., Gudkova, K., Halder, S., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Hedges, M.T., Heredia De La Cruz, I., Hern{\'a}ndez Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E.C., Hohmann, M., Hsu, C.-L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Jacobs, W.W., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Junkerkalefeld, H., Kaleta, M., Kaliyar, A.B., Karyan, G., Kawasaki, T., Kiesling, C., Kim, C.-H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kindo, H., Kinoshita, K., Kody?, P., Kohani, S., Kojima, K., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kri?an, P., Krokovny, P., Kumar, J., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.-J., Lacaprara, S., Lange, J.S., Laurenza, M., Leboucher, R., Le Diberder, F.R., Levit, D., Lewis, P.M., Li, L.K., Libby, J., Liptak, Z., Liu, Q.Y., Liu, Z.Q., Liventsev, D., Longo, S., Lueck, T., Lyu, C., Ma, Y., Maggiora, M., Maharana, S.P., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Manthei, A.C., Mantovano, M., Marinas, C., Martel, L., Martellini, C., Martini, A., Massaccesi, L., Masuda, M., Matsuoka, K., Matvienko, D., Maurya, S.K., McKenna, J.A., Meier, F., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Moneta, S., Mrvar, M., Mussa, R., Nakamura, I., Nakamura, K.R., Nakao, M., Nakazawa, Y., Narimani Charan, A., Naruki, M., Narwal, D., Natochii, A., Nayak, L., Nazaryan, G., Nisar, N.K., Nishida, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Paladino, A., Panta, A., Pardi, S., Park, H., Park, J., Paschen, B., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Peruzzi, I., Peschke, R., Pestotnik, R., Piilonen, L.E., Pinna Angioni, G., Podesta-Lerma, P.L.M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M.T., Purwar, H., Rad, N., Rados, P., Raeuber, G., Reif, M., Reiter, S., Ripp-Baudot, I., Rizzo, G., Rizzuto, L.B., Rocchetti, P., Roney, J.M., Rostomyan, A., Rout, N., S, ers, D.A., S, ilya, S., Sangal, A., Santelj, L., Sato, Y., Scavino, B., Schw, a, C., Seino, Y., Selce, A., Senyo, K., Sevior, M.E., Sfienti, C., Shan, W., Sharma, C., Shen, C.P., Shillington, T., Shiu, J.-G., Simon, F., Singh, J.B., Skorupa, J., Sobie, R.J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Stari?, M., Stefkova, S., Stroili, R., Sue, Y., Sumihama, M., Sutcliffe, W., Suzuki, S.Y., Svidras, H., Takizawa, M., Tamponi, U., Tanida, K., Taniguchi, N., Tenchini, F., Tiwary, R., Tonelli, D., Torassa, E., Trabelsi, K., Tsaklidis, I., Ueda, I., Uematsu, Y., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Urquijo, P., Ushiroda, Y., Vahsen, S.E., Van Tonder, R., Varner, G.S., Varvell, K.E., Vinokurova, A., Vismaya, V.S., Vitale, L., Vossen, A., Wallner, S., Wang, E., Wang, M.-Z., Wang, X.L., Warburton, A., Watanabe, M., Watanuki, S., Welsch, M., Wessel, C., Won, E., Xu, X.P., Yabsley, B.D., Yamada, S., Yan, W., Yang, S.B., Ye, H., Yin, J.H., Yook, Y.M., Yoshihara, K., Zhai, Y., Zhang, Y., Zhilich, V., Zhou, Q.D., Zhou, X.Y., Zhukova, V.I., ?leb?{\'i}k, R.

Physical Review Letters   Vol. 131 ( 5 )   2023

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We present the first measurement of the ratio of branching fractions of inclusive semileptonic B-meson decays, R(Xe/μ)=B(B→Xeν)/B(B→Xμν), a precision test of electron-muon universality, using data corresponding to 189 fb-1 from electron-positron collisions collected with the Belle II detector. In events where the partner B meson is fully reconstructed, we use fits to the lepton momentum spectra above 1.3 GeV/c to obtain R(Xe/μ)=1.007±0.009(stat)±0.019(syst), which is the most precise lepton-universality test of its kind and agrees with the standard-model expectation.

DOI： 10.1103/PhysRevLett.131.051804

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PubMed

Study of the muon decay-in-flight in the τ- →μ- ν ¯ μντ decay to measure the Michel parameter ζ′ Reviewed

Bodrov, D., Pakhlov, P., Adachi, I., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Banerjee, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Biswas, D., Bobrov, A., Bondar, A., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.-C., Cheon, B.G., Chilikin, K., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Dole?al, Z., Dong, T.V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B.G., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Halder, S., Hayasaka, K., Hayashii, H., Hedges, M.T., Herrmann, D., Hou, W.-S., Hsu, C.-L., Iijima, T., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Joo, K.K., Kalita, D., Kaliyar, A.B., Kang, K.H., Kawasaki, T., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kindo, H., Kinoshita, K., Kody?, P., Korobov, A., Korpar, S., Kri?an, P., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.-J., Lange, J.S., Lee, S.C., Li, J., Li, L.K., Li, Y., Libby, J., Lieret, K., Lin, Y.-R., Liventsev, D., Ma, Y., Masuda, M., Matsuda, T., Maurya, S.K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Mussa, R., Nakamura, I., Nakao, M., Narwal, D., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N.K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Park, S.-H., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Rabusov, A., Russo, G., S, ilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schw, a, C., Seino, Y., Senyo, K., Shan, W., Shapkin, M., Sharma, C., Shiu, J.-G., Singh, J.B., Sokolov, A., Solovieva, E., Stari?, M., Stottler, Z.S., Sumihama, M., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Tiwary, R., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Vahsen, S.E., Varner, G., Vinokurova, A., Vossen, A., Wang, D., Wang, E., Wang, M.-Z., Watanuki, S., Xu, X., Yabsley, B.D., Yan, W., Yang, S.B., Yelton, J., Yin, J.H., Yuan, C.Z., Yusa, Y., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 108 ( 1 )   2023

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We present the first measurement of the Michel parameter ζ′ in the τ-→μ-ν¯μντ decay using the full data sample of 988 fb-1 collected by the Belle detector operating at the KEKB asymmetric energy e+e- collider. The method is based on the reconstruction of the μ-→e-ν¯eνμ decay-in-flight in the Belle central drift chamber and relies on the correlation between muon spin and its daughter electron momentum. We study the main sources of the background that can imitate the signal decay, such as kaon and pion decays-in-flight and charged particle scattering on the detector material. Highly efficient methods of their suppression are developed and applied to select 165 signal-candidate events. We obtain ζ′=0.22±0.94±0.42 where the first uncertainty is statistical, and the second one is systematic. The result is in agreement with the Standard Model prediction of ζ′=1.

DOI： 10.1103/PhysRevD.108.012003

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Study of e+e- →ηφ via initial state radiation at Belle Reviewed

Zhu, W.J., Gao, B.S., Wang, X.L., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aushev, T., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.-C., Chen, A., Cheon, B.G., Chilikin, K., Cho, H.E., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Dole?al, Z., Dong, T.V., Epifanov, D., Ferlewicz, D., Fulsom, B.G., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Halder, S., Hara, T., Hayasaka, K., Hayashii, H., Hsu, C.-L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W.W., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Joo, K.K., Kang, K.H., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kinoshita, K., Kody?, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.-J., Lalwani, K., Lam, T., Laurenza, M., Lee, S.C., Li, J., Li, L.K., Li, Y., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S.K., Merola, M., Miyabayashi, K., Mizuk, R., Nakao, M., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N.K., Nishida, S., Ono, H., Pakhlova, G., Pardi, S., Park, S.-H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prim, M.T., Rout, N., Russo, G., S, ilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shiu, J.-G., Solovieva, E., Stani?, S., Stari?, M., Stottler, Z.S., Strube, J.F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Vahsen, S.E., Van Tonder, R., Varner, G., Vossen, A., Waheed, E., Wang, E., Wang, M.-Z., Watanabe, M., Watanuki, S., Won, E., Yan, W., Yang, S.B., Yin, J.H., Yuan, C.Z., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 107 ( 1 )   2023

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DOI： 10.1103/PhysRevD.107.012006

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Study of e+e- → ς0 ς ¯ 0 and ς+ ς ¯ - by initial state radiation method at Belle Reviewed

Gong, G., Li, L.K., Zhang, Y., Yan, W., Adachi, I., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Banerjee, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.-C., Chen, A., Chen, Y., Cheon, B.G., Chilikin, K., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dole?al, Z., Dong, T.V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B.G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Golob, B., Graziani, E., Gudkova, K., Halder, S., Hayasaka, K., Hayashii, H., Hedges, M.T., Hou, W.-S., Hsu, C.-L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jang, E.-J., Jia, S., Jin, Y., Joo, K.K., Kaliyar, A.B., Kang, K.H., Kawasaki, T., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, Y.-K., Kinoshita, K., Kody?, P., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kumar, R., Kumara, K., Kwon, Y.-J., Lam, T., Lange, J.S., Lee, S.C., Lewis, P., Li, C.H., Li, Y., Li, Y.B., Li Gioi, L., Libby, J., Lieret, K., Lin, Y.-R., Liventsev, D., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S.K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mussa, R., Nakamura, I., Nakano, T., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N.K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Patra, S., Paul, S., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Rostomyan, A., Rout, N., Russo, G., Sakai, Y., S, ilya, S., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shan, W., Shapkin, M., Sharma, C., Shen, C.P., Shiu, J.-G., Shwartz, B., Simon, F., Sokolov, A., Solovieva, E., Stari?, M., Sumihama, M., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, K., Uno, S., Urquijo, P., Vahsen, S.E., Van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Wang, M.-Z., Wang, X.L., Watanabe, M., Watanuki, S., Werbycka, O., Won, E., Xu, X., Yabsley, B.D., Yang, S.B., Yelton, J., Yin, J.H., Yuan, C.Z., Yuan, L., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 107 ( 7 )   2023

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The processes e+e-→ς0ς¯0 and e+e-→ς+ς¯- are studied using initial-state-radiation events in a sample of 980 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The cross sections from the mass threshold to 3 GeV/c2 and the effective form factors of ς0 and ς+ are measured. In the charmonium region, we observe the decays J/ψ→ς0ς¯0 and J/ψ→ς+ς¯- and determine the respective branching fractions.

DOI： 10.1103/PhysRevD.107.072008

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Search for X (3872) →π+π-π0 at Belle Reviewed

Yin, J.H., Won, E., Adachi, I., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.-C., Chang, P., Chekelian, V., Chen, A., Cheon, B.G., Chilikin, K., Cho, H.E., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Dole?al, Z., Dong, T.V., Ferber, T., Ferlewicz, D., Fulsom, B.G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Hou, W.-S., Hsu, C.-L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jang, E.-J., Jia, S., Jin, Y., Joo, K.K., Kakuno, H., Kang, K.H., Karyan, G., Kawasaki, T., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kinoshita, K., Kody?, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Lam, T., Lange, J.S., Lee, S.C., Li, C.H., Li, J., Li, L.K., Li, Y., Li, Y.B., Li Gioi, L., Libby, J., Lieret, K., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S.K., Meier, F., Merola, M., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Moon, H.K., Mrvar, M., Mussa, R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N.K., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.-H., Patra, S., Paul, S., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Rout, N., Russo, G., Sakai, Y., S, ilya, S., Sangal, A., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shen, C.P., Shiu, J.-G., Singh, J.B., Sokolov, A., Solovieva, E., Stari?, M., Stottler, Z.S., Strube, J.F., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Van Tonder, R., Varner, G., Vinokurova, A., Waheed, E., Wang, E., Wang, M.-Z., Watanabe, M., Watanuki, S., Yabsley, B.D., Yan, W., Yang, S.B., Yuan, C.Z., Yusa, Y., Zhai, Y., Zhang, Z.P., Zhilich, V., Zhukova, V., Zhulanov, V.

Physical Review D   Vol. 107 ( 5 )   2023

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We present a search for the decay X(3872)→π+π-π0 in the (772±11)×106 ϒ(4S)→BB¯ data sample collected at the Belle detector, where the X(3872) is produced in B±→K±X(3872) and B0→KS0X(3872) decays. We do not observe a signal, and set 90% credible upper limits for two different models of the decay processes: if the decay products are distributed uniformly in phase space, B(X(3872)→π+π-π0)<1.3%, and if M(π+π-) is concentrated near the mass of the D0D¯0 pair in the process X(3872)→D0D¯∗0+c.c.→D0D¯0π0→π+π-π0, B(X(3872)→π+π-π0)<1.2×10-3.

DOI： 10.1103/PhysRevD.107.052004

Scopus

Search for the Lepton Flavor Violating Decays B+ →k+τ±ℓ∓ (ℓ=e, μ) at Belle Reviewed

Watanuki, S., De Marino, G., Trabelsi, K., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Banerjee, S., Bauer, M., Behera, P., Belous, K., Bessner, M., Bhardwaj, V., Bhuyan, B., Biswas, D., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., Cao, L., ?ervenkov, D., Chang, M.-C., Cheon, B.G., Chilikin, K., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dong, T.V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B.G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Halder, S., Han, X., Hara, T., Hayasaka, K., Hayashii, H., Herrmann, D., Hou, W.-S., Hsu, C.-L., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Ji, Q.P., Jia, S., Jin, Y., Joo, K.K., Kaliyar, A.B., Kichimi, H., Kim, C.H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kinoshita, K., Kody?, P., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kuhr, T., Kumar, M., Kumara, K., Kuzmin, A., Kwon, Y.-J., Lange, J.S., Laurenza, M., Lee, S.C., Lewis, P., Li, L.K., Li, Y., Li Gioi, L., Libby, J., Lin, Y.-R., Liventsev, D., Matsuda, T., Maurya, S.K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Nakao, M., Nayak, L., Nayak, M., Nisar, N.K., Nishida, S., Ono, H., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Park, S.-H., Passeri, A., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., R{\"o}hrken, M., Rout, N., Russo, G., S, ilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shan, W., Shapkin, M., Shiu, J.-G., Shwartz, B., Simon, F., Solovieva, E., Stari?, M., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Van Tonder, R., Varner, G., Varvell, K.E., Wang, D., Wang, E., Wang, M.-Z., Won, E., Xu, X., Yabsley, B.D., Yan, W., Yang, S.B., Yelton, J., Yusa, Y., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review Letters   Vol. 130 ( 26 )   2023

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We present a search for the lepton flavor violating decays B+→K+τ±ℓ∓, with ℓ=(e,μ), using the full data sample of 772×106 BB¯ pairs recorded by the Belle detector at the KEKB asymmetric-energy e+e- collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode. We find no evidence for B±→K±τℓ decays and set upper limits on their branching fractions at the 90% confidence level in the (1-3)×10-5 range. The obtained limits are the world's best results.

DOI： 10.1103/PhysRevLett.130.261802

Scopus

PubMed

Search for the decay Bs0 →π0π0 at Belle Reviewed

Borah, J., Bhuyan, B., Adachi, I., Aihara, H., Asner, D.M., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Banerjee, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bilka, T., Biswas, D., Bodrov, D., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.C., Chekelian, V., Chen, C., Cheon, B.G., Chilikin, K., Cho, H.E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Dole?al, Z., Dong, T.V., Epifanov, D., Ferlewicz, D., Frey, A., Fulsom, B.G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Halder, S., Hara, T., Hayasaka, K., Hayashii, H., Hedges, M.T., Herrmann, D., Hern{\'a}ndez Villanueva, M., Hou, W.S., Hsu, C.L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jang, E.J., Ji, Q.P., Jin, Y., Joo, K.K., Kalita, D., Kaliyar, A.B., Kang, K.H., Kawasaki, T., Kichimi, H., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kody?, P., Konno, T., Korobov, A., Korpar, S., Kri?an, P., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lalwani, K., Lam, T., Lange, J.S., Laurenza, M., Lee, S.C., Levit, D., Li, L.K., Li, Y., Li Gioi, L., Libby, J., Lin, Y.R., Liventsev, D., Luo, T., Masuda, M., Matvienko, D., Maurya, S.K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Mussa, R., Nakamura, I., Nakao, M., Narwal, D., Natkaniec, Z., Natochii, A., Nayak, L., Nisar, N.K., Nishida, S., Ogawa, K., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, J., Park, S.H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., R{\"o}hrken, M., Rostomyan, A., Russo, G., Sakai, Y., S, ilya, S., Santelj, L., Savinov, V., Schnell, G., Schw, a, C., Schwartz, A.J., Seino, Y., Senyo, K., Sevior, M.E., Shan, W., Shapkin, M., Sharma, C., Shen, C.P., Shiu, J.G., Simon, F., Singh, J.B., Sokolov, A., Solovieva, E., Stari?, M., Stottler, Z.S., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Vahsen, S.E., Van Tonder, R., Varner, G., Varvell, K.E., Vinokurova, A., Vossen, A., Wang, D., Wang, M.Z., Watanabe, M., Won, E., Xu, X., Yabsley, B.D., Yan, W., Yang, S.B., Yelton, J., Yin, J.H., Yook, Y., Yuan, C.Z., Yuan, L., Yusa, Y., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 107 ( 5 )   2023

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Language：English   Publishing type：Research paper (scientific journal)  

We report the results of the first search for the decay Bs0→π0π0 using 121.4 fb-1 of data collected at the ϒ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe no signal and set a 90% confidence level upper limit of 7.7×10-6 on the Bs0→π0π0 decay branching fraction.

DOI： 10.1103/PhysRevD.107.L051101

Scopus

Search for the decay B0 →k∗0τ+τ- at the Belle experiment Reviewed

Dong, T.V., Luo, T., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bernlochner, F., Bessner, M., Bhuyan, B., Bilka, T., Biswal, J., Bobrov, A., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.-C., Chang, P., Chen, A., Cheon, B.G., Chilikin, K., Cho, H.E., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Czank, T., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Dole?al, Z., Dubey, S., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B.G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hara, T., Hartbrich, O., Hayasaka, K., Hern, ez Villanueva, M., Hou, W.-S., Hsu, C.-L., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jang, E.-J., Jia, S., Jin, Y., Joo, K.K., Kahn, J., Kang, K.H., Kichimi, H., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, S.H., Kim, Y.-K., Kimmel, T.D., Kody?, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Kroeger, R., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.-J., Laurenza, M., Lee, S.C., Li, J., Li, L.K., Li, Y.B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Macqueen, C., Masuda, M., Matsuda, T., Matvienko, D., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Nakao, M., Natochii, A., Nayak, L., Niiyama, M., Nisar, N.K., Nishida, S., Nishimura, K., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.-H., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Popov, V., Prencipe, E., Prim, M.T., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., S, ilya, S., Sangal, A., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shiu, J.-G., Simon, F., Solovieva, E., Stari?, M., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Unno, Y., Uno, S., Van Tonder, R., Varner, G., Varvell, K.E., Waheed, E., Wang, C.H., Wang, E., Wang, P., Watanabe, M., Watanuki, S., Werbycka, O., Won, E., Yabsley, B.D., Yan, W., Yang, S.B., Ye, H., Yin, J.H., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 108 ( 1 )   2023

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This paper presents a search for the rare flavor-changing neutral current process B0→K∗0τ+τ- using data taken with the Belle detector at the KEKB asymmetric energy e+e- collider. The analysis is based on the entire υ(4S) resonance data sample of 711 fb-1, corresponding to 772×106BB¯ pairs. In our search we fully reconstruct the companion B meson produced in the process e+e-→υ(4S)→BB¯ from its hadronic decay modes, and look for the decay B0→K∗0τ+τ- in the rest of the event. No evidence for a signal is found. We report an upper limit on the branching fraction B(B0→K∗0τ+τ-)<3.1×10-3 at 90% confidence level. This is the first direct limit on B(B0→K∗0τ+τ-).

DOI： 10.1103/PhysRevD.108.L011102

Scopus

Search for rare decays B+ → Ds (∗)+ η, Ds (∗)+ K ¯ 0, D+η, and D+K0 Reviewed

Kumar, M., Bhardwaj, V., Lalwani, K., Adachi, I., Aihara, H., Asner, D.M., Aushev, T., Babu, V., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.-C., Chang, P., Cheon, B.G., Chilikin, K., Cho, H.E., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., Dash, N., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Dole?al, Z., Dong, T.V., Dossett, D., Epifanov, D., Ferlewicz, D., Fulsom, B.G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hara, T., Hayasaka, K., Hayashii, H., Hou, W.-S., Hsu, C.-L., Iijima, T., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Joo, K.K., Kalita, D., Kang, K.H., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kinoshita, K., Kody?, P., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kumar, R., Kumara, K., Kwon, Y.-J., Lam, T., Lange, J.S., Laurenza, M., Lee, S.C., Li, C.H., Li, J., Li, L.K., Li, Y., Li, Y.B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S.K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Mrvar, M., Nakamura, I., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N.K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.-H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Purohit, M.V., Rout, N., Russo, G., S, ilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shen, C.P., Shiu, J.-G., Singh, J.B., Solovieva, E., Stari?, M., Stottler, Z.S., Strube, J.F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Tsuboyama, T., Uchida, M., Unno, Y., Uno, S., Van Tonder, R., Varner, G., Varvell, K.E., Vinokurova, A., Waheed, E., Wang, E., Wang, M.-Z., Wang, X.L., Watanabe, M., Watanuki, S., Werbycka, O., Wiechczynski, J., Won, E., Yabsley, B.D., Yan, W., Yang, S.B., Yelton, J., Yin, J.H., Yuan, C.Z., Yusa, Y., Zhai, Y., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 107 ( 3 )   2023

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We present a study of rare decay modes B+→Ds+h0, B+→Ds∗+h0, and B+→D+h0, where h0 denotes the neutral meson η or K0, using a data sample of (772±10)×106 BB¯ events produced at the ϒ(4S) resonance. The data were collected by the Belle detector operating at the asymmetric-energy KEKB collider. We find no evidence for these decays, so we set upper limits at the 90% confidence level on the branching fractions of B+→Ds+h0, Ds∗+h0, and D+h0 decay modes. Along with these rare decay modes, we report improved measurements of the color-suppressed decay branching fractions B(B¯0→D0η)=(26.6±1.2±2.1)×10-5 and B(B¯0→D0K̄0)=(5.6±0.5±0.2)×10-5. The first and second quoted uncertainties are statistical and systematic, respectively.

DOI： 10.1103/PhysRevD.107.L031101

Scopus

Search for Lepton-Flavor-Violating τ Decays to a Lepton and an Invisible Boson at Belle II Reviewed

Adachi, I., Adamczyk, K., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D.M., Aushev, T., Aushev, V., Bae, H., Bahinipati, S., Bambade, P., Banerjee, S., Baudot, J., Bauer, M., Baur, A., Beaubien, A., Becker, J., Behera, P.K., Bennett, J.V., Bernieri, E., Bernlochner, F.U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhuyan, B., Bianchi, F., Bilka, T., Bilokin, S., Biswas, D., Bodrov, D., Bolz, A., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Chang, M.-C., Chang, P., Cheaib, R., Cheema, P., Chekelian, V., Chen, Y.Q., Cheon, B.G., Chilikin, K., Chirapatpimol, K., Cho, H.-E., Cho, K., Cho, S.-J., Choi, S.-K., Choudhury, S., Cinabro, D., Corona, L., Cunliffe, S., Das, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S.A., De Nardo, G., De Nuccio, M., De Pietro, G., De Sangro, R., Destefanis, M., Dey, S., De Yta-Hern, ez, A., Dhamija, R., Di Canto, A., Di Capua, F., Dingfelder, J., Dole?al, Z., Dom{\'i}nguez Jim{\'e}nez, I., Dong, T.V., Dorigo, M., Dort, K., Dossett, D., Dreyer, S., Dubey, S., Dujany, G., Ecker, P., Eliachevitch, M., Epifanov, D., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finck, C., Finocchiaro, G., Flood, K., Fodor, A., Forti, F., Fulsom, B.G., Gabrielli, A., Ganiev, E., Garcia-Hern, ez, M., Gaur, V., Gaz, A., Gellrich, A., Ghevondyan, G., Giordano, R., Giri, A., Glazov, A., Gobbo, B., Godang, R., Goldenzweig, P., Gradl, W., Gr, erath, S., Graziani, E., Greenwald, D., Gruberov{\'a}, Z., Gu, T., Gudkova, K., Guilliams, J., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Heredia De La Cruz, I., Hern{\'a}ndez Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E.C., Hohmann, M., Hsu, C.-L., Humair, T., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Jackson, P., Jacobs, W.W., Jaffe, D.E., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Joo, K.K., Junkerkalefeld, H., Kakuno, H., Kaliyar, A.B., K, ra, J., Kang, K.H., Kang, S., Karl, R., Karyan, G., Kiesling, C., Kim, C.-H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kindo, H., Kinoshita, K., Kody?, P., Koga, T., Kohani, S., Kojima, K., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T.M.G., Kri?an, P., Krokovny, P., Kuhr, T., Kumar, J., Kumar, R., Kumara, K., Kunigo, T., Kuzmin, A., Kwon, Y.-J., Lacaprara, S., Lam, T., Lanceri, L., Lange, J.S., Laurenza, M., Lautenbach, K., Leboucher, R., Le Diberder, F.R., Leitl, P., Lewis, P.M., Li, C., Li, L.K., Li, Y.B., Libby, J., Lieret, K., Liptak, Z., Liu, Q.Y., Liventsev, D., Longo, S., Lozar, A., Lueck, T., Luo, T., Lyu, C., Maggiora, M., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Manthei, A., Marcello, S., Marinas, C., Martel, L., Martini, A., Martinov, T., Massaccesi, L., Masuda, M., Matsuda, T., Matsuoka, K., Matvienko, D., Maurya, S.K., McKenna, J.A., Meier, F., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Molina-Gonzalez, N., Moneta, S., Moser, H.-G., Mrvar, M., Mussa, R., Nakamura, I., Nakamura, K.R., Nakao, M., Nakayama, H., Nakazawa, Y., Narimani Charan, A., Naruki, M., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Niebuhr, C., Nisar, N.K., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Paladino, A., Panta, A., Paoloni, E., Pardi, S., Parham, K., Park, H., Park, S.-H., Paschen, B., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Peruzzi, I., Peschke, R., Pestotnik, R., Pham, F., Piccolo, M., Piilonen, L.E., Pinna Angioni, G., Podesta-Lerma, P.L.M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M.T., Purwar, H., Rad, N., Rados, P., Raeuber, G., Raiz, S., Ramirez Morales, A., Reif, M., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Robertson, S.H., Rodr{\'i}guez P{\'e}rez, D., Roney, J.M., Rostomyan, A., Rout, N., Russo, G., S, ers, D.A., S, ilya, S., Sangal, A., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schueler, J., Schw, a, C., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sevior, M.E., Sfienti, C., Shen, C.P., Shi, X.D., Shillington, T., Shiu, J.-G., Shwartz, B., Sibidanov, A., Simon, F., Singh, J.B., Skorupa, J., Sobie, R.J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Stari?, M., Stefkova, S., Stottler, Z.S., Stroili, R., Strube, J., Sue, Y., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S.Y., Svidras, H., Takizawa, M., Tamponi, U., Tanida, K., Tanigawa, H., Tenchini, F., Thaller, A., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Uchida, M., Ueda, I., Uematsu, Y., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Ushiroda, Y., Vahsen, S.E., Van Tonder, R., Varner, G.S., Varvell, K.E., Vinokurova, A., Vitale, L., Vobbilisetti, V., Wakeling, H.M., Wang, E., Wang, M.-Z., Wang, X.L., Warburton, A., Watanabe, M., Watanuki, S., Welsch, M., Wessel, C., Wiechczynski, J., Xu, X.P., Yabsley, B.D., Yamada, S., Yan, W., Yang, S.B., Ye, H., Yelton, J., Yin, J.H., Yook, Y.M., Yoshihara, K., Yuan, C.Z., Yusa, Y., Zani, L., Zhang, Y., Zhilich, V., Zhou, Q.D., Zhou, X.Y., Zhukova, V.I., ?leb?{\'i}k, R.

Physical Review Letters   Vol. 130 ( 18 )   2023

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Language：English   Publishing type：Research paper (scientific journal)  

We search for lepton-flavor-violating τ-→e-α and τ-→μ-α decays, where α is an invisible spin-0 boson. The search uses electron-positron collisions at 10.58 GeV center-of-mass energy with an integrated luminosity of 62.8 fb-1, produced by the SuperKEKB collider and collected with the Belle II detector. We search for an excess in the lepton-energy spectrum of the known τ-→e-ν¯eντ and τ-→μ-ν¯μντ decays. We report 95% confidence-level upper limits on the branching-fraction ratio B(τ-→e-α)/B(τ-→e-ν¯eντ) in the range (1.1-9.7)×10-3 and on B(τ-→μ-α)/B(τ-→μ-ν¯μντ) in the range (0.7-12.2)×10-3 for α masses between 0 and 1.6 GeV/c2. These results provide the most stringent bounds on invisible boson production from τ decays.

DOI： 10.1103/PhysRevLett.130.181803

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Search for CP violation and measurement of branching fractions and decay asymmetry parameters for Λ_c⁺→Λh⁺ and Λ_c⁺→Σ⁰h⁺ (h=K,π) Reviewed

Li, L.K., Shan, W., Kinoshita, K., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aushev, T., Babu, V., Bahinipati, S., Banerjee, S., Behera, P., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Borah, J., Bra?ko, M., Branchini, P., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.-C., Chang, P., Chekelian, V., Chen, A., Cheon, B.G., Chilikin, K., Cho, H.E., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Dash, N., De Nardo, G., De Pietro, G., Dhamija, R., Capua, F.D., Dole?al, Z., Dong, T.V., Epifanov, D., Ferber, T., Frey, A., Fulsom, B.G., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Gong, G., Graziani, E., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Hedges, M.T., Hou, W.-S., Hsu, C.-L., Inami, K., Ishikawa, A., Itoh, R., Jacobs, W.W., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Joo, K.K., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kody?, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Krokovny, P., Kuhr, T., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.-J., Lai, Y.-T., Lam, T., Lange, J.S., Lee, S.C., Li, J., Li, S.X., Li, Y., Li, Y.B., Gioi, L.L., Libby, J., Lieret, K., Masuda, M., Maurya, S.K., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mussa, R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N.K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, S.-H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sakai, Y., S, ilya, S., Sangal, A., Savinov, V., Schnell, G., Schueler, J., Schw, a, C., Schwartz, A.J., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shen, C.P., Shiu, J.-G., Singh, J.B., Sokolov, A., Solovieva, E., Stari?, M., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, S., Usov, Y., Vahsen, S.E., van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Waheed, E., Wang, E., Wang, X.L., Watanabe, M., Watanuki, S., Werbycka, O., Won, E., Xu, X., Yabsley, B.D., Yan, W., Yang, S.B., Yelton, J., Yin, J.H., Yook, Y., Yuan, C.Z., Zhang, Z.P., Zhilich, V., Zhukova, V.

Science Bulletin   Vol. 68 ( 6 ) page： 583 - 592   2023

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We report a study of Λc+→Λh+ and Λc+→Σ0h+ (h=K,π) decays based on a data sample of 980fb-1 collected with the Belle detector at the KEKB energy-asymmetric e+e- collider. The first results of direct CP asymmetry in two-body singly Cabibbo-suppressed (SCS) decays of charmed baryons are measured, ACPdir(Λc+→ΛK+)=+0.021±0.026±0.001 and ACPdir(Λc+→Σ0K+)=+0.025±0.054±0.004. We also make the most precise measurement of the decay asymmetry parameters (α) for the four modes of interest and search for CP violation via the α-induced CP asymmetry (ACPα). We measure ACPα(Λc+→ΛK+)=-0.023±0.086±0.071 and ACPα(Λc+→Σ0K+)=+0.08±0.35±0.14, which are the first ACPα results for SCS decays of charmed baryons. We search for Λ-hyperon CP violation in Λc+→(Λ,Σ0)π+ and find ACPα(Λ→pπ-)=+0.013±0.007±0.011. This is the first time that hyperon CP violation has been measured via Cabibbo-favored charm decays. No evidence of baryon CP violation is found. We also obtain the most precise branching fractions for two SCS Λc+ decays, B(Λc+→ΛK+)=(6.57±0.17±0.11±0.35)×10-4 and B(Λc+→Σ0K+)=(3.58±0.19±0.06±0.19)×10-4. The first uncertainties are statistical and the second systematic, while the third uncertainties come from the uncertainties on the world average branching fractions of Λc+→(Λ,Σ0)π+.

DOI： 10.1016/j.scib.2023.02.017

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Search for a Dark Photon and an Invisible Dark Higgs Boson in μ+μ- and Missing Energy Final States with the Belle II Experiment Reviewed

Abudin{\'e}n, F., Adachi, I., Aggarwal, L., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D.M., Atmacan, H., Aushev, T., Aushev, V., Babu, V., Bahinipati, S., Bambade, P., Banerjee, S., Bansal, S., Baudot, J., Baur, A., Beaubien, A., Becker, J., Behera, P.K., Bennett, J.V., Bernieri, E., Bernlochner, F.U., Bertemes, M., Bertholet, E., Bessner, M., Bhuyan, B., Bianchi, F., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Bolz, A., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Bussino, S., Campajola, M., Casarosa, G., Cecchi, C., Chekelian, V., Chen, C., Chen, Y.Q., Cheon, B.G., Chilikin, K., Chirapatpimol, K., Cho, H.-E., Cho, K., Cho, S.-J., Choi, S.-K., Choudhury, S., Cinabro, D., Corona, L., Cunliffe, S., Dattola, F., De Marino, G., De Nardo, G., De Nuccio, M., De Pietro, G., De Sangro, R., Destefanis, M., Dey, S., De Yta-Hern, ez, A., Dhamija, R., Di Canto, A., Di Capua, F., Dingfelder, J., Dole?al, Z., Dom{\'i}nguez Jim{\'e}nez, I., Dong, T.V., Dorigo, M., Dort, K., Dossett, D., Dreyer, S., Dubey, S., Dujany, G., Eliachevitch, M., Epifanov, D., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finck, C., Finocchiaro, G., Flood, K., Fodor, A., Forti, F., Frey, A., Fulsom, B.G., Ganiev, E., Garcia-Hern, ez, M., Gaur, V., Gaz, A., Gellrich, A., Giordano, R., Giri, A., Gobbo, B., Godang, R., Goldenzweig, P., Gradl, W., Gr, erath, S., Graziani, E., Greenwald, D., Gu, T., Gudkova, K., Guilliams, J., Hadjivasiliou, C., Hara, K., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Hedges, M.T., Heredia De La Cruz, I., Hern{\'a}ndez Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E.C., Hoek, M., Hohmann, M., Hsu, C.-L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Jackson, P., Jacobs, W.W., Jaffe, D.E., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Junkerkalefeld, H., Kakuno, H., Kaliyar, A.B., K, ra, J., Kang, K.H., Karl, R., Karyan, G., Kawasaki, T., Ketter, C., Kichimi, H., Kiesling, C., Kim, C.-H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kinoshita, K., Kody?, P., Koga, T., Kohani, S., Kojima, K., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T.M.G., Kri?an, P., Krokovny, P., Kuhr, T., Kumar, R., Kumara, K., Kunigo, T., Kwon, Y.-J., Lacaprara, S., Lai, Y.-T., Lam, T., Lange, J.S., Laurenza, M., Leboucher, R., Lee, S.C., Li, L.K., Li, Y.B., Libby, J., Lieret, K., Liu, Q.Y., Liventsev, D., Longo, S., Lozar, A., Lueck, T., Lyu, C., Maggiora, M., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Marcello, S., Marinas, C., Martel, L., Martini, A., Massaccesi, L., Masuda, M., Matsuoka, K., Mckenna, J.A., Meier, F., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Mohanty, G.B., Molina-Gonzalez, N., Moneta, S., Moon, H., Mrvar, M., Nakamura, I., Nakamura, K.R., Nakao, M., Nakayama, H., Narimani Charan, A., Naruki, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N.K., Nishida, S., Nishimura, K., Ogawa, S., Ono, H., Oskin, P., Pakhlova, G., Paladino, A., Panta, A., Pardi, S., Parham, K., Park, H., Park, S.-H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Piccolo, M., Piilonen, L.E., Pinna Angioni, G., Podesta-Lerma, P.L.M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M.T., Purwar, H., Rad, N., Rados, P., Raiz, S., Ramirez Morales, A., Reif, M., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Robertson, S.H., Rodr{\'i}guez P{\'e}rez, D., Roney, J.M., Rostomyan, A., Rout, N., Sahoo, D., S, ers, D.A., S, ilya, S., Santelj, L., Sato, Y., Scavino, B., Schueler, J., Schw, a, C., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sevior, M.E., Sfienti, C., Shillington, T., Shiu, J.-G., Sibidanov, A., Simon, F., Singh, J.B., Skorupa, J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Stari?, M., Stefkova, S., Stottler, Z.S., Stroili, R., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S.Y., Svidras, H., Tabata, M., Takizawa, M., Tamponi, U., Tanaka, S., Tanida, K., Tanigawa, H., Tenchini, F., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Uchida, M., Ueda, I., Uematsu, Y., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Ushiroda, Y., Vahsen, S.E., Van Tonder, R., Varner, G.S., Varvell, K.E., Vinokurova, A., Vitale, L., Vobbilisetti, V., Waheed, E., Wakeling, H.M., Wang, E., Wang, M.-Z., Warburton, A., Watanabe, M., Watanuki, S., Welsch, M., Wessel, C., Windel, H., Won, E., Xu, X.P., Yabsley, B.D., Yamada, S., Yan, W., Yang, S.B., Ye, H., Yin, J.H., Yoshihara, K., Yuan, C.Z., Yusa, Y., Zani, L., Zhang, Y., Zhilich, V., Zhou, Q.D., Zhou, X.Y., Zhukova, V.I., ?leb?{\'i}k, R.

Physical Review Letters   Vol. 130 ( 7 )   2023

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The dark photon A′ and the dark Higgs boson h′ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of A′ and h′ in the dark Higgsstrahlung process e+e-→A′h′ with A′→μ+μ- and h′ invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV in data collected by the Belle II experiment in 2019. With an integrated luminosity of 8.34 fb-1, we observe no evidence for signal. We obtain exclusion limits at 90% Bayesian credibility in the range of 1.7-5.0 fb on the cross section and in the range of 1.7×10-8-200×10-8 on the effective coupling µ2×αD for the A′ mass in the range of 4.0 GeV/c2<MA′<9.7 GeV/c2 and for the h′ mass Mh′<MA′, where µ is the mixing strength between the standard model and the dark photon and αD is the coupling of the dark photon to the dark Higgs boson. Our limits are the first in this mass range.

DOI： 10.1103/PhysRevLett.130.071804

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PubMed

Observation of e+e- →ωχbJ (1P) and Search for Xb →ω ϒ (1S) at s near 10.75 GeV Reviewed

Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D.M., Aushev, T., Aushev, V., Bae, H., Bambade, P., Banerjee, S., Baudot, J., Bauer, M., Beaubien, A., Becker, J., Behera, P.K., Bennett, J.V., Bernieri, E., Bernlochner, F.U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhuyan, B., Bianchi, F., Bilka, T., Biswas, D., Bodrov, D., Bolz, A., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Chang, M.-C., Cheema, P., Chekelian, V., Chen, Y.Q., Chilikin, K., Chirapatpimol, K., Cho, H.-E., Cho, K., Cho, S.-J., Choi, S.-K., Choudhury, S., Cinabro, D., Corona, L., Cunliffe, S., Das, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S.A., De Nardo, G., De Nuccio, M., De Pietro, G., De Sangro, R., Destefanis, M., Dey, S., De Yta-Hern, ez, A., Dhamija, R., Di Canto, A., Di Capua, F., Dole?al, Z., Dom{\'i}nguez Jim{\'e}nez, I., Dong, T.V., Dorigo, M., Dort, K., Dreyer, S., Dubey, S., Dujany, G., Eliachevitch, M., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finocchiaro, G., Fodor, A., Forti, F., Fulsom, B.G., Ganiev, E., Gaur, V., Gaz, A., Gellrich, A., Ghevondyan, G., Giordano, R., Giri, A., Glazov, A., Gobbo, B., Godang, R., Goldenzweig, P., Gr, erath, S., Graziani, E., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Guilliams, J., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Heredia De La Cruz, I., Hern{\'a}ndez Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E.C., Hirata, H., Hohmann, M., Hsu, C.-L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Iwasaki, M., Jackson, P., Jacobs, W.W., Jaffe, D.E., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Joo, K.K., Junkerkalefeld, H., Kaliyar, A.B., Kang, K.H., Karl, R., Karyan, G., Ketter, C., Kiesling, C., Kim, C.-H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kindo, H., Kody?, P., Koga, T., Kohani, S., Kojima, K., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T.M.G., Kri?an, P., Krokovny, P., Kumar, R., Kumara, K., Kunigo, T., Kuzmin, A., Kwon, Y.-J., Lacaprara, S., Lam, T., Lanceri, L., Lange, J.S., Laurenza, M., Lautenbach, K., Leboucher, R., Lewis, P.M., Li, C., Li, L.K., Libby, J., Lieret, K., Liptak, Z., Liu, Q.Y., Liventsev, D., Longo, S., Lozar, A., Lueck, T., Lyu, C., Maggiora, M., Maiti, R., Manfredi, R., Manoni, E., Marcello, S., Marinas, C., Martel, L., Martini, A., Martinov, T., Massaccesi, L., Masuda, M., Matsuoka, K., Maurya, S.K., McKenna, J.A., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Mizuk, R., Molina-Gonzalez, N., Moneta, S., Moser, H.-G., Mrvar, M., Mussa, R., Nakamura, I., Nakao, M., Nakazawa, Y., Narimani Charan, A., Naruki, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Nisar, N.K., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Paladino, A., Panta, A., Paoloni, E., Pardi, S., Park, H., Park, S.-H., Paschen, B., Passeri, A., Paul, S., Pedlar, T.K., Peruzzi, I., Peschke, R., Pestotnik, R., Piccolo, M., Piilonen, L.E., Podesta-Lerma, P.L.M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M.T., Purwar, H., Rad, N., Raiz, S., Ramirez Morales, A., Reif, M., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Robertson, S.H., Roney, J.M., Rostomyan, A., Rout, N., Russo, G., S, ers, D.A., S, ilya, S., Sangal, A., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schueler, J., Schw, a, C., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sevior, M.E., Sfienti, C., Shen, C.P., Shi, X.D., Shillington, T., Sibidanov, A., Singh, J.B., Skorupa, J., Sobie, R.J., Soffer, A., Solovieva, E., Spataro, S., Stari?, M., Stefkova, S., Stottler, Z.S., Stroili, R., Sue, Y., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S.Y., Svidras, H., Takizawa, M., Tanida, K., Tanigawa, H., Tenchini, F., Thaller, A., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Uchida, M., Ueda, I., Uematsu, Y., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Ushiroda, Y., Vahsen, S.E., Van Tonder, R., Varner, G.S., Vinokurova, A., Vitale, L., Vobbilisetti, V., Wakeling, H.M., Wang, E., Wang, M.-Z., Warburton, A., Watanuki, S., Welsch, M., Wessel, C., Won, E., Xu, X.P., Yabsley, B.D., Yamada, S., Yan, W., Yang, S.B., Ye, H., Yelton, J., Yin, J.H., Yook, Y.M., Yoshihara, K., Yuan, C.Z., Zani, L., Zhang, Y., Zhou, X.Y., Zhukova, V.I., ?leb?{\'i}k, R.

Physical Review Letters   Vol. 130 ( 9 )   2023

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Language：English   Publishing type：Research paper (scientific journal)  

We study the processes e+e-→ωχbJ(1P) (J=0, 1, or 2) using samples at center-of-mass energies s=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and 4.7 fb-1 of integrated luminosity, respectively. These data were collected with the Belle II detector during special operations of the SuperKEKB collider above the ϒ(4S) resonance. We report the first observation of ωχbJ(1P) signals at s=10.745 GeV. By combining Belle II data with Belle results at s=10.867 GeV, we find energy dependencies of the Born cross sections for e+e-→ωχb1,b2(1P) to be consistent with the shape of the ϒ(10753) state. These data indicate that the internal structures of the ϒ(10753) and ϒ(10860) states may differ. Including data at s=10.653 GeV, we also search for the bottomonium equivalent of the X(3872) state decaying into ωϒ(1S). No significant signal is observed for masses between 10.45 and 10.65 GeV/c2.

DOI： 10.1103/PhysRevLett.130.091902

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PubMed

Observation of a threshold cusp at the Λη threshold in the pK- mass spectrum with Λc+ →pK-π+ decays Reviewed

Yang, S.B., Tanida, K., Ahn, J.K., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bodrov, D., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.-C., Chang, P., Cheon, B.G., Chilikin, K., Cho, H.E., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Pietro, G., Dhamija, R., Di Capua, F., Dole?al, Z., Dong, T.V., Dossett, D., Epifanov, D., Fulsom, B.G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Hou, W.-S., Hsu, C.-L., Iijima, T., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W.W., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Joo, K.K., Kang, K.H., Karyan, G., Kawasaki, T., Kichimi, H., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kim, Y.J., Kim, Y.-K., Kindo, H., Kody?, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.-J., Lam, T., Lange, J.S., Laurenza, M., Lee, J.Y., Lee, S.C., Li, C.H., Li, J., Li, L.K., Li, Y., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S.K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Nakamura, I., Nakano, T., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Niiyama, M., Nisar, N.K., Nishida, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.-H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Rout, N., Russo, G., S, ilya, S., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shen, C.P., Shiu, J.-G., Singh, J.B., Sokolov, A., Solovieva, E., Stari?, M., Sumihama, M., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tenchini, F., Trabelsi, K., Tsuboyama, T., Uchida, M., Uglov, T., Unno, Y., Uno, S., Ushiroda, Y., Usov, Y., Van Tonder, R., Varner, G., Vossen, A., Waheed, E., Wang, E., Wang, M.-Z., Wang, X.L., Watanabe, M., Watanuki, S., Werbycka, O., Won, E., Yabsley, B.D., Yan, W., Yelton, J., Yin, J.H., Yuan, C.Z., Yusa, Y., Zhai, Y., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 108 ( 3 )   2023

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We observe a narrow peaking structure in the pK- invariant-mass spectrum near the Λη threshold. The peak is clearly seen in 1.5 million events of Λc+→pK-π+ decay using the 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. We try two approaches to explain this structure: as a new resonance and as a cusp at the Λη threshold. The best fit is obtained with a coherent sum of a Flatté function and a constant background amplitude with the reduced χ2 of 257/243 (p=0.25), while the fits to Breit-Wigner functions are unfavored by more than 7σ. The best fit explains the structure as a cusp at the Λη threshold, and the obtained parameters are consistent with the known properties of Λ(1670). The observation gives the first identification of a threshold cusp in hadrons from the spectrum shape.

DOI： 10.1103/PhysRevD.108.L031104

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Measurement of the branching fraction and search for CP violation in D0 → KS0 KS0 π+π- decays at Belle Reviewed

Sangal, A., Schwartz, A.J., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., ?ervenkov, D., Chen, A., Cheon, B.G., Chilikin, K., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Dash, N., De Pietro, G., Dhamija, R., Di Capua, F., Dole?al, Z., Dong, T.V., Dossett, D., Epifanov, D., Frey, A., Fulsom, B.G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Herrmann, D., Hou, W.-S., Hsu, C.-L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jang, E.-J., Jia, S., Jin, Y., Joo, K.K., Kang, K.H., Kawasaki, T., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kinoshita, K., Kody?, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.-J., Lam, T., Lange, J.S., Laurenza, M., Lee, S.C., Li, C.H., Li, L.K., Li, Y., Li, Y.B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Martini, A., Masuda, M., Matvienko, D., Maurya, S.K., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Moon, H.K., Mussa, R., Nakao, M., Narwal, D., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N.K., Nishida, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.-H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Rout, N., Russo, G., S, ilya, S., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shen, C.P., Shiu, J.-G., Shwartz, B., Singh, J.B., Sokolov, A., Solovieva, E., Stari?, M., Stottler, Z.S., Strube, J.F., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Ushiroda, Y., Usov, Y., Van Tonder, R., Varner, G., Varvell, K.E., Vinokurova, A., Waheed, E., Wang, E., Wang, M.-Z., Watanabe, M., Watanuki, S., Wiechczynski, J., Won, E., Yabsley, B.D., Yan, W., Yang, S.B., Ye, H., Yelton, J., Yin, J.H., Yuan, C.Z., Yusa, Y., Zhang, Z.P., Zhilich, V., Zhukova, V., Zhulanov, V.

Physical Review D   Vol. 107 ( 5 )   2023

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We measure the branching fraction for the Cabibbo-suppressed decay D0→KS0KS0π+π- and search for CP violation via a measurement of the CP asymmetry ACP as well as the T-odd triple-product asymmetry aCPT. We use 922 fb-1 of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy e+e- collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel D0→KS0π+π-; the result is B(D0→KS0KS0π+π-)=[4.79±0.08(stat)±0.10(syst)±0.31(norm)]×10-4, where the first uncertainty is statistical, the second is systematic, and the third is from uncertainty in the normalization channel. We also measure ACP=[-2.51±1.44(stat)-0.10+0.11(syst)]%, and aCPT=[-1.95±1.42(stat)-0.12+0.14(syst)]%. These results show no evidence of CP violation.

DOI： 10.1103/PhysRevD.107.052001

Scopus

Measurement of the branching fraction of Ξc0 → Λc+ π- At Belle Reviewed

Tang, S.S., Li, Y.B., Shen, C.P., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Behera, P., Belous, K., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Budano, A., ?ervenkov, D., Chang, M.-C., Chang, P., Chekelian, V., Cheon, B.G., Chilikin, K., Cho, H.E., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Dole?al, Z., Dong, T.V., Ferlewicz, D., Fulsom, B.G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Hayashii, H., Hedges, M.T., Herrmann, D., Hou, W.-S., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jia, S., Jin, Y., Joo, K.K., Kang, K.H., Karyan, G., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kinoshita, K., Kody?, P., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kumar, M., Kumara, K., Kwon, Y.-J., Lam, T., Lange, J.S., Lee, S.C., Li, J., Li, L.K., Li, Y., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matvienko, D., Maurya, S.K., Meier, F., Merola, M., Miyabayashi, K., Mizuk, R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N.K., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Pakhlova, G., Pardi, S., Park, S.-H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Rout, N., Russo, G., Sakai, Y., S, ilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shiu, J.-G., Sokolov, A., Solovieva, E., Stari?, M., Stottler, Z.S., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Urquijo, P., Usov, Y., Van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Waheed, E., Wang, E., Wang, M.-Z., Watanabe, M., Won, E., Xu, X., Yabsley, B.D., Yan, W., Yang, S.B., Yin, J.H., Yuan, C.Z., Yusa, Y., Zhai, Y., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 107 ( 3 )   2023

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Based on a data sample of 983 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider, we present the study of the heavy-flavor-conserving decay Ξc0→Λc+π- with Λc+ reconstructed via its pK-π+ decay mode. The branching fraction ratio B(Ξc0→Λc+π-)/B(Ξc0→Ξ-π+) is measured to be 0.38±0.04±0.04. Combining with the world average value of B(Ξc0→Ξ-π+), the branching fraction B(Ξc0→Λc+π-) is deduced to be (0.54±0.05±0.05±0.12)%. Here, the uncertainties above are statistical, systematic, and from B(Ξc0→Ξ-π+), respectively.

DOI： 10.1103/PhysRevD.107.032005

Scopus

Measurement of the branching fractions for Cabibbo-suppressed decays D+ →K+K-π+π0 and D (s)+ →K+π-π+π0 at Belle Reviewed

Li, L.K., Schwartz, A.J., Kinoshita, K., Won, E., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, P., Chen, A., Cheon, B.G., Cho, H.E., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Das, S., Dash, N., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dole?al, Z., Dong, T.V., Dossett, D., Epifanov, D., Frey, A., Fulsom, B.G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Herrmann, D., Hou, W.-S., Hsu, C.-L., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jia, S., Jin, Y., Kalita, D., Kaliyar, A.B., Kang, K.H., Kawasaki, T., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kim, K.T., Kim, Y.-K., Kody?, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.-J., Lai, Y.-T., Lam, T., Laurenza, M., Lee, S.C., Li, J., Li, Y., Li, Y.B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Martini, A., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S.K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Moon, H.K., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N.K., Nishida, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.-H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., S, ilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shiu, J.-G., Simon, F., Singh, J.B., Sokolov, A., Solovieva, E., Stari?, M., Stottler, Z.S., Sumihama, M., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Uno, K., Uno, S., Ushiroda, Y., Usov, Y., Van Tonder, R., Varner, G., Varvell, K.E., Vossen, A., Waheed, E., Wang, E., Wang, M.-Z., Wang, X.L., Watanuki, S., Werbycka, O., Wiechczynski, J., Yabsley, B.D., Yan, W., Yang, S.B., Ye, H., Yelton, J., Yin, J.H., Yuan, C.Z., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 107 ( 3 )   2023

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We present measurements of the branching fractions for the singly Cabibbo-suppressed decays D+→K+K-π+π0 and Ds+→K+π-π+π0, and the doubly Cabibbo-suppressed decay D+→K+π-π+π0, based on 980 fb-1 of data recorded by the Belle experiment at the KEKB e+e- collider. We measure these modes relative to the Cabibbo-favored modes D+→K-π+π+π0 and Ds+→K+K-π+π0. Our results for the ratios of branching fractions are B(D+→K+K-π+π0)/B(D+→K-π+π+π0)=(11.32±0.13±0.26)%, B(D+→K+π-π+π0)/B(D+→K-π+π+π0)=(1.68±0.11±0.03)%, and B(Ds+→K+π-π+π0)/B(Ds+→K+K-π+π0)=(17.13±0.62±0.51)%, where the uncertainties are statistical and systematic, respectively. The second value corresponds to (5.83±0.42)×tan4θC, where θC is the Cabibbo angle; this value is larger than other measured ratios of branching fractions for a doubly Cabibbo-suppressed charm decay to a Cabibbo-favored decay. Multiplying these results by world average values for B(D+→K-π+π+π0) and B(Ds+→K+K-π+π0) yields B(D+→K+K-π+π0)=(7.08±0.08±0.16±0.20)×10-3, B(D+→K+π-π+π0)=(1.05±0.07±0.02±0.03)×10-3, and B(Ds+→K+π-π+π0)=(9.44±0.34±0.28±0.32)×10-3, where the third uncertainty is due to the branching fraction of the normalization mode. The first two results are consistent with, but more precise than, the current world averages. The last result is the first measurement of this branching fraction.

DOI： 10.1103/PhysRevD.107.033003

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Measurement of the mass and width of the Λc (2625)+ charmed baryon and the branching ratios of Λc (2625)+ → ςc0 π+ and Λc (2625)+ → ςc+ + π- Reviewed

Wang, D., Yelton, J., Adachi, I., Ahn, J.K., Aihara, H., Asner, D.M., Atmacan, H., Ayad, R., Babu, V., Banerjee, S., Bauer, M., Behera, P., Belous, K., Bennett, J., Bessner, M., Bilka, T., Biswas, D., Bodrov, D., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., ?ervenkov, D., Chang, M.-C., Chen, A., Cheon, B.G., Cho, H.E., Cho, K., Cho, S.-J., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dole?al, Z., Dong, T.V., Dossett, D., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B.G., Garg, R., Gaur, V., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Han, X., Hayasaka, K., Hayashii, H., Hedges, M.T., Hsu, C.-L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jang, E.-J., Jia, S., Jin, Y., Kaliyar, A.B., Kang, K.H., Kawasaki, T., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kinoshita, K., Kody?, P., Korobov, A., Korpar, S., Kovalenko, E., Kri?an, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.-J., Lam, T., Lange, J.S., Lee, S.C., Levit, D., Lewis, P., Li, L.K., Li, Y., Li, Y.B., Li Gioi, L., Libby, J., Lieret, K., Lin, Y.-R., Liventsev, D., Matsuda, T., Matvienko, D., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Mussa, R., Nakamura, I., Nakano, T., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N.K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Patra, S., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Prencipe, E., Prim, M.T., Rout, N., Russo, G., S, ilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schw, a, C., Seino, Y., Senyo, K., Sevior, M.E., Shan, W., Shapkin, M., Sharma, C., Shen, C.P., Shiu, J.-G., Sokolov, A., Solovieva, E., Stari?, M., Sumihama, M., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uno, S., Van Tonder, R., Varner, G., Varvell, K.E., Vinokurova, A., Wang, M.-Z., Wang, X.L., Watanabe, M., Watanuki, S., Werbycka, O., Won, E., Xu, X., Yabsley, B.D., Yan, W., Yang, S.B., Yin, J.H., Yuan, C.Z., Yuan, L., Zhang, Z.P., Zhilich, V., Zhukova, V.

Physical Review D   Vol. 107 ( 3 )   2023

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Using the entire data sample of 980 fb-1 collected at or near the ϒ(4S) resonance with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we report the measurement of the mass, width, and the branching ratios of the Λc(2625)+ charmed baryon. The mass difference between Λc(2625)+ and Λc+ is measured to be M(Λc(2625)+)-M(Λc+)=341.518±0.006±0.049 MeV/c2. The upper limit on the width is measured to be Γ(Λc(2625)+)<0.52 MeV/c2 at 90% confidence level. Based on a full Dalitz plot fit, branching ratios with respect to the mode Λc(2625)+→Λc+π+π- are measured to be B(Λc(2625)+→ςc0π+)B(Λc(2625)+→Λc+π+π-)=(5.19±0.23±0.40)% and B(Λc(2625)+→ςc++π-)B(Λc(2625)+→Λc+π+π-)=(5.13±0.26±0.32)%, where the first and second uncertainties are statistical and systematic, respectively. These measurements can be used to further constrain the parameters of the underlying theoretical models.

DOI： 10.1103/PhysRevD.107.032008

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Measurement of the Λc+ Lifetime Reviewed

Abudin{\'e}n, F., Aggarwal, L., Ahmed, H., Ahn, J.K., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D.M., Atmacan, H., Aushev, T., Aushev, V., Babu, V., Bae, H., Bambade, P., Banerjee, S., Bansal, S., Baudot, J., Bauer, M., Baur, A., Beaubien, A., Becker, J., Bennett, J.V., Bernieri, E., Bernlochner, F.U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhardwaj, V., Bianchi, F., Bilka, T., Biswas, D., Bodrov, D., Bolz, A., Bonvicini, G., Bozek, A., Bra?ko, M., Branchini, P., Briere, R.A., Browder, T.E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Chang, M.-C., Chang, P., Cheaib, R., Cheema, P., Chen, C., Chen, Y.Q., Chen, Y.-T., Cheon, B.G., Chilikin, K., Chirapatpimol, K., Cho, H.-E., Cho, K., Cho, S.-J., Choi, S.-K., Choudhury, S., Cinabro, D., Corona, L., Cremaldi, L.M., Cunliffe, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S.A., De Nardo, G., De Nuccio, M., De Pietro, G., De Sangro, R., Destefanis, M., De Yta-Hern, ez, A., Dhamija, R., Di Canto, A., Di Capua, F., Dingfelder, J., Dole?al, Z., Dom{\'i}nguez Jim{\'e}nez, I., Dong, T.V., Dorigo, M., Dort, K., Dossett, D., Dreyer, S., Dujany, G., Eliachevitch, M., Epifanov, D., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finocchiaro, G., Flood, K., Fodor, A., Forti, F., Frey, A., Fulsom, B.G., Gabrielli, A., Ganiev, E., Garcia-Hern, ez, M., Gaz, A., Gellrich, A., Ghevondyan, G., Giordano, R., Giri, A., Glazov, A., Gobbo, B., Godang, R., Goldenzweig, P., Gradl, W., Gr, erath, S., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Guilliams, J., Halder, S., Hara, K., Hartbrich, O., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Heredia De La Cruz, I., Hern{\'a}ndez Villanueva, M., Hershenhorn, A., Higuchi, T., Hohmann, M., Humair, T., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Iwasaki, Y., Jackson, P., Jacobs, W.W., Jaffe, D.E., Ji, Q.P., Jin, Y., Junkerkalefeld, H., Kaleta, M., K, ra, J., Kang, K.H., Karl, R., Karyan, G., Kiesling, C., Kim, C.-H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kindo, H., Kinoshita, K., Kody?, P., Koga, T., Kohani, S., Kojima, K., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T.M.G., Kri?an, P., Krokovny, P., Kuhr, T., Kumar, J., Kumar, R., Kumara, K., Kunigo, T., Kwon, Y.-J., Lacaprara, S., Lam, T., Lanceri, L., Lange, J.S., Laurenza, M., Leboucher, R., Lee, S.C., Leitl, P., Levit, D., Li, L.K., Li, S.X., Li, Y.B., Libby, J., Liptak, Z., Liu, Q.Y., Liventsev, D., Longo, S., Lueck, T., Lyu, C., Maggiora, M., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Marcello, S., Marinas, C., Martel, L., Martini, A., Massaccesi, L., Masuda, M., Matsuoka, K., Matvienko, D., Mckenna, J.A., Meier, F., Merola, M., Milesi, M., Miller, C., Miyabayashi, K., Mohanty, G.B., Molina-Gonzalez, N., Moneta, S., Moon, H., Moser, H.-G., Mrvar, M., Mussa, R., Nakamura, I., Nakao, M., Nakayama, H., Narimani Charan, A., Naruki, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Niebuhr, C., Nisar, N.K., Nishida, S., Nishimura, K., Ono, H., Oskin, P., Oxford, E.R., Pakhlova, G., Paladino, A., Panta, A., Paoloni, E., Pardi, S., Parham, K., Park, H., Park, S.-H., Passeri, A., Pedlar, T.K., Peruzzi, I., Peschke, R., Pestotnik, R., Pham, F., Piilonen, L.E., Pinna Angioni, G., Podesta-Lerma, P.L.M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M.T., Purwar, H., Rad, N., Rados, P., Raiz, S., Reif, M., Reiter, S., Ripp-Baudot, I., Rizzo, G., Robertson, S.H., Roney, J.M., Rostomyan, A., Rout, N., Russo, G., S, ers, D.A., S, ilya, S., Sangal, A., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schw, a, C., Schwartz, A.J., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sfienti, C., Shen, C.P., Shillington, T., Shiu, J.-G., Sibidanov, A., Simon, F., Sobie, R.J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Stari?, M., Stefkova, S., Stroili, R., Strube, J., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S.Y., Svidras, H., Takahashi, M., Takizawa, M., Tamponi, U., Tanaka, S., Tanida, K., Tanigawa, H., Taniguchi, N., Tenchini, F., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Uchida, M., Unger, K., Unno, Y., Uno, K., Uno, S., Urquijo, P., Ushiroda, Y., Vahsen, S.E., Van Tonder, R., Varner, G.S., Varvell, K.E., Vinokurova, A., Vitale, L., Vobbilisetti, V., Waheed, E., Wakeling, H.M., Wang, E., Wang, M.-Z., Wang, X.L., Warburton, A., Watanuki, S., Welsch, M., Wessel, C., Wiechczynski, J., Windel, H., Won, E., Xu, X.P., Yabsley, B.D., Yamada, S., Yang, S.B., Ye, H., Yelton, J., Yin, J.H., Yoshihara, K., Yusa, Y., Zhang, Y., Zhilich, V., Zhou, Q.D., Zhukova, V.I., ?leb?{\'i}k, R.

Physical Review Letters   Vol. 130 ( 7 )   2023

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Language：English   Publishing type：Research paper (scientific journal)  

An absolute measurement of the Λc+ lifetime is reported using Λc+→pK-π+ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the δ(4S) resonance, is 207.2 fb-1. The result, τ(Λc+)=203.20±0.89±0.77 fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.

DOI： 10.1103/PhysRevLett.130.071802

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PubMed

Measurement of the τ -lepton mass with the Belle II experiment Reviewed

Adachi, I., Adamczyk, K., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D.M., Atmacan, H., Aushev, T., Aushev, V., Aversano, M., Babu, V., Bae, H., Bahinipati, S., Bambade, P., Banerjee, S., Barrett, M., Baudot, J., Bauer, M., Baur, A., Beaubien, A., Becherer, F., Becker, J., Behera, P.K., Bennett, J.V., Bernlochner, F.U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhuyan, B., Bianchi, F., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Bolz, A., Bondar, A., Borah, J., Bozek, A., Bra?ko, M., Branchini, P., Browder, T.E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Cerasoli, J., Chang, M.-C., Chang, P., Cheaib, R., Cheema, P., Chekelian, V., Cheon, B.G., Chilikin, K., Chirapatpimol, K., Cho, H.-E., Cho, K., Cho, S.-J., Choi, S.-K., Choudhury, S., Cochran, J., Corona, L., Cremaldi, L.M., Das, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S.A., De Marino, G., De Nardo, G., De Nuccio, M., De Pietro, G., De Sangro, R., Destefanis, M., Dey, S., De Yta-Hern, ez, A., Dhamija, R., Di Canto, A., Di Capua, F., Dingfelder, J., Dole?al, Z., Dom{\'i}nguez Jim{\'e}nez, I., Dong, T.V., Dorigo, M., Dort, K., Dreyer, S., Dubey, S., Dujany, G., Ecker, P., Eliachevitch, M., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finck, C., Finocchiaro, G., Fodor, A., Forti, F., Frey, A., Fulsom, B.G., Gabrielli, A., Ganiev, E., Garcia-Hern, ez, M., Garmash, A., Gaudino, G., Gaur, V., Gaz, A., Gellrich, A., Ghevondyan, G., Ghosh, D., Ghumaryan, H., Giakoustidis, G., Giordano, R., Giri, A., Glazov, A., Gobbo, B., Godang, R., Gogota, O., Goldenzweig, P., Grace, P., Gradl, W., Grammatico, T., Gr, erath, S., Graziani, E., Greenwald, D., Gruberov{\'a}, Z., Gu, T., Guan, Y., Gudkova, K., Halder, S., Han, Y., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Hedges, M.T., Heredia De La Cruz, I., Hern{\'a}ndez Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E.C., Hoek, M., Hohmann, M., Hsu, C.-L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Jackson, P., Jacobs, W.W., Jaffe, D.E., Jang, E.-J., Ji, Q.P., Jia, S., Jin, Y., Johnson, A., Joo, K.K., Junkerkalefeld, H., Kalita, D., Kaliyar, A.B., K, ra, J., Kang, K.H., Karyan, G., Kawasaki, T., Keil, F., Ketter, C., Kiesling, C., Kim, C.-H., Kim, D.Y., Kim, K.-H., Kim, Y.-K., Kindo, H., Kinoshita, K., Kody?, P., Koga, T., Kohani, S., Kojima, K., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T.M.G., Kri?an, P., Krokovny, P., Kuhr, T., Kumar, J., Kumar, M., Kumara, K., Kunigo, T., Kuzmin, A., Kwon, Y.-J., Lacaprara, S., Lai, Y.-T., Lam, T., Lanceri, L., Lange, J.S., Laurenza, M., Lautenbach, K., Leboucher, R., Le Diberder, F.R., Leitl, P., Levit, D., Lewis, P.M., Li, C., Li, L.K., Li, Y., Libby, J., Liu, Q.Y., Liu, Z.Q., Liventsev, D., Longo, S., Lueck, T., Lyu, C., Ma, Y., Maggiora, M., Maharana, S.P., Maiti, R., Maity, S., Mancinelli, G., Manfredi, R., Manoni, E., Mantovano, M., Marcantonio, D., Marcello, S., Marinas, C., Martel, L., Martellini, C., Martini, A., Martinov, T., Massaccesi, L., Masuda, M., Matsuda, T., Matsuoka, K., Matvienko, D., Maurya, S.K., McKenna, J.A., Mehta, R., Meier, F., Merola, M., Metzner, F., Milesi, M., Miller, C., Mirra, M., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Molina-Gonzalez, N., Mondal, S., Moneta, S., Moser, H.-G., Mrvar, M., Mussa, R., Nakamura, I., Nakazawa, Y., Narimani Charan, A., Naruki, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Niebuhr, C., Nisar, N.K., Nishida, S., Ono, H., Onuki, Y., Oskin, P., Otani, F., Pakhlov, P., Pakhlova, G., Paladino, A., Panta, A., Paoloni, E., Pardi, S., Parham, K., Park, H., Park, S.-H., Passeri, A., Patra, S., Paul, S., Pedlar, T.K., Peruzzi, I., Peschke, R., Pestotnik, R., Pham, F., Piccolo, M., Piilonen, L.E., Podesta-Lerma, P.L.M., Podobnik, T., Pokharel, S., Praz, C., Prell, S., Prencipe, E., Prim, M.T., Purwar, H., Rad, N., Rados, P., Raeuber, G., Raiz, S., Reif, M., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Robertson, S.H., Roehrken, M., Roney, J.M., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., S, ilya, S., Sangal, A., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schmitt, C., Schw, a, C., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sevior, M.E., Sfienti, C., Shan, W., Sharma, C., Shen, C.P., Shi, X.D., Shillington, T., Shiu, J.-G., Shtol, D., Shwartz, B., Sibidanov, A., Simon, F., Singh, J.B., Skorupa, J., Sobie, R.J., Sobotzik, M., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Stari?, M., Stavroulakis, P., Stefkova, S., Stottler, Z.S., Stroili, R., Sumihama, M., Sumisawa, K., Sutcliffe, W., Svidras, H., Takahashi, M., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Thaller, A., Tittel, O., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Tsaklidis, I., Ueda, I., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Urquijo, P., Ushiroda, Y., Vahsen, S.E., Van Tonder, R., Varner, G.S., Varvell, K.E., Veronesi, M., Vismaya, V.S., Vitale, L., Vobbilisetti, V., Volpe, R., Wach, B., Wakai, M., Wallner, S., Wang, E., Wang, M.-Z., Wang, Z., Warburton, A., Watanabe, M., Watanuki, S., Welsch, M., Wessel, C., Won, E., Xu, X.P., Yabsley, B.D., Yamada, S., Yan, W., Yang, S.B., Yin, J.H., Yoshihara, K., Yuan, C.Z., Yusa, Y., Zani, L., Zhilich, V., Zhou, J.S., Zhou, Q.D., Zhukova, V.I., ?leb?{\'i}k, R.

Physical Review D   Vol. 108 ( 3 )   2023

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Language：English   Publishing type：Research paper (scientific journal)  

We present a measurement of the τ-lepton mass using a sample of about 175 million e+e-→τ+τ- events collected with the Belle II detector at the SuperKEKB e+e- collider at a center-of-mass energy of 10.579 GeV. This sample corresponds to an integrated luminosity of 190 fb-1. We use the kinematic edge of the τ pseudomass distribution in the decay τ-→π-π+π-ντ and measure the τ mass to be 1777.09±0.08±0.11 MeV/c2, where the first uncertainty is statistical and the second systematic. This result is the most precise to date.

DOI： 10.1103/PhysRevD.108.032006

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