Faculty Profiles - IIJIMA, Toru

Papers - IIJIMA, Toru

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Test of Lepton-Flavor Universality in B -> K*l(+)l(-) Decays at Belle Reviewed

Wehle S., Adachi I, Adamczyk K., Aihara H., Asner D. M., Atmacan H., Aulchenko V, Aushev T., Ayad R., Babu V, Behera P., Berger M., Bhardwaj V, Biswal J., Bozek A., Browder T. E., Campajola M., Cao L., Chang M-C, Chen A., Cheon B. G., Chilikin K., Cho K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Dash N., De Nardo G., Di Capua F., Dubey S., Eidelman S., Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Greenwald D., Guan Y., Haba J., Hartbrich O., Hayasaka K., Hayashii H., Hedges M. T., Higuchi T., Hou W-S, Hsu C-L, Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jia S., Jin Y., Joffe D., Kahn J., Kaliyar A. B., Karyan G., Kichimi H., Kim D. Y., Kim K. T., Kim S. H., Kim Y-K, Kinoshita K., Komarov I, Korpar S., Kotchetkov D., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lange J. S., Lee J. Y., Lee S. C., Li Y. B., Libby J., Liptak Z., Liventsev D., Luo T., MacNaughton J., Masuda M., Matsuda T., McNeil J. T., Merola M., Metzner F., Miyata H., Mizuk R., Mohanty G. B., Moon T. J., Mussa R., Nakao M., Natochii A., Nayak M., Niebuhr C., Niiyama M., Nisar N. K., Nishida S., Ogawa K., Ogawa S., Ono H., Onuki Y., Pakhlov P., Pakhlova G., Park H., Park S-H, Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Resmi P. K., Ritter M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Savinov V, Schneider O., Schnell G., Schueler J., Schwanda C., Schwartz A. J., Seino Y., Senyo K., Sevior M. E., Shapkin M., Shiu J-G, Shwartz B., Solovieva E., Strube J. F., Sumiyoshi T., Sutcliffe W., Takizawa M., Tamponi U., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno S., Ushiroda Y., Vahsen S. E., Van Tonder R., Varner G., Varvell K. E., Vorobyev V., Wang C. H., Wang M-Z, Wang P., Wang X. L., Won E., Xu X., Yang S. B., Ye H., Yin J. H., Yuan C. Z., Zhang Z. P., Zhilich V, Zhukova V, Zhulanov V

PHYSICAL REVIEW LETTERS Vol. 126 ( 16 ) 2021.4

Search for the dark photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle Reviewed

Li Y., Li Y. B., Shen C. P., Adachi I., Aihara H., Asner D. M., Atmacan H., Aulchenko V., Ayad R., Babu V., Badhrees I., Bakich A. M., Behera P., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cao L., Cervenkov D., Chang P., Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi S. -K., Choi Y., Cinabro D., Cunliffe S., De Nardo G., Di Capua F., Di Carlo S., Dolezal Z., Dong T. V., Eidelman S., Fast J. E., Ferber T., Ferlewicz D., Fulsom B. G., Garg R., Gaur V., Gabyshev N., Garmash A., Giri A., Goldenzweig P., Golob B., Grube B., Hara T., Hayasaka K., Hayashii H., Hou W. -S., Hsu C. -L., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jia S., Jin Y., Joo K. K., Kang K. H., Karyan G., Kichimi H., Kim C. H., Kim D. Y., Kim S. H., Kinoshita K., Kodys P., Korpar S., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kuzmin A., Kwon Y. -J., Lalwani K., Lange J. S., Lee I. S., Lee S. C., Lewis P., Li C. H., Li L. K., Gioi L. Li, Libby J., Lieret K., Liventsev D., MacQueen C., Masuda M., Matsuda T., Matvienko D., Merola M., Miyata H., Mizuk R., Mussa R., Nakao M., Nath K. J., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pang T., 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., Roehrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Santelj L., Savinov V., Schneider O., Schnell G., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shiu J. -G., Shwartz B., Sokolov A., Solovieva E., Stanic S., Staric M., Stottler Z. S., Sumihama M., Sumiyoshi T., Sutcliffe W., Takizawa M., Tanida K., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno S., Van Tonder R., Varner G., Vinokurova A., Wang C. H., Wang M. -Z., Wang X. L., Watanabe M., Won E., Yang S. B., Ye H., Yelton J., Yin J. H., Yuan C. Z., Zhang Z. P., Zhilich V., Zhukova V., Zhulanov V.

JOURNAL OF HIGH ENERGY PHYSICS ( 4 ) 2021.4

Measurements of the branching fractions of Λc+→pη and Λc+→pπ0 decays at Belle Reviewed International journal

S. X. Li, C. P. Shen, I. Adachi, J. K. Ahn, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, F. Bernlochner, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M.-C. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, K. Gudkova, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, B. H. Kim, C. H. Kim, D. Y. Kim, K.-H. Kim, S. H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, R. Mizuk, S. Mohanty, T. Mori, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, H. Ono, Y. Onuki, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, V. Shebalin, J.-G. Shiu, B. Shwartz, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, K. Uno, S. Uno, P. Urquijo, R. Van Tonder, G. Varner, A. Vossen, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

Physical Review D Vol. 103 ( 7 ) 2021.4

Language：English Publishing type：Research paper (scientific journal) Publisher：American Physical Society (APS)

We report measurements of the branching fractions of singly Cabibbo-suppressed decays Λc+→pη and Λc+→pπ0 using the full Belle data sample corresponding to an integrated luminosity of 980.6 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric energy collider. A clear Λc+ signal is seen in the invariant mass distribution of pη. The fitted number of signal events of the Λc+→pη process is 7734±263; from this, we measure the ratio of branching fractions B(Λc+→pη)/B(Λc+→pK-π+)=[2.258±0.077(stat)±0.122(syst)]×10-2, from which we infer the branching fraction B(Λc+→pη)=[1.42±0.05(stat)±0.11(syst)]×10-3. In addition, no significant signal for Λc+→pπ0 is found, so an upper limit on the branching fraction of B(Λc+→pπ0)<8.0×10-5 at a 90% credibility level is set, more than 3 times better than the best current upper limit.

DOI： 10.1103/physrevd.103.072004

Web of Science

Scopus

arXiv

Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.103.072004/fulltext

Measurement of the CKM matrix element vertical bar V-cb vertical bar from B-0 -> D*(-) l(+) nu(l) at Belle (vol 100, 052007, 2019) Reviewed

Waheed E., Urquijo P., Ferlewicz D., Adachi I., Adamczyk K., Aihara H., Al Said S., Asner D. M., Atmacan H., Aushev T., Ayad R., Babu V., Badhrees I., Bansal V., Behera P., Beleno C., Bernlochner F., Bhuyan B., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cervenkov D., Chang P., Chekelian V., Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Di Carlo S., Dolezal Z., Dong T. V., Dossett D., Eidelman S., Epifanov D., Fast J. E., Fulsom B. G., Garg R., Gaur V., Garmash A., Giri A., Goldenzweig P., Golob B., Grzymkowska O., Haba J., Hara T., Hayasaka K., Hayashii H., Hedges T., Hou W-S, Hsu C-L, Iijima T., Inami K., Inguglia G., Ishikawa A., Iwasaki M., Iwasaki Y., Jacobs W. W., Jeon H. B., Jia S., Jin Y., Joffe D., Joo K. K., Kahn J., Kaliyar A. B., Karyan G., Kawasaki T., Kim C. H., Kim D. Y., Kim K. T., Kim S. H., Kinoshita K., Kodys P., Korpar S., Kotchetkov D., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kuzmin A., Kwon Y-J, Lange J. S., Lee J. Y., Lee S. C., Li C. H., Li L. K., Li Y. B., Gioi L. Li, Libby J., Lieret K., Liventsev D., Lu P-C, Luo T., MacNaughton J., Masuda M., Matvienko D., Merola M., Metzner F., Miyabayashi K., Miyata H., Mizuk R., Mohanty G. B., Mori T., Mussa R., Nakamura I., Nakao M., Nath K. J., Natkaniec Z., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Ono H., Pakhlov P., Pakhlova G., Pal B., Pardi S., Park H., Park S-H, Paul S., Pestotnik R., Piilonen L. E., Popov V., Prencipe E., Prim M., Rostomyan A., Russo G., Sakai Y., Salehi M., Sandilya S., Sanuki T., Savinov V., Schneider O., Schnell G., Schueler J., Schwanda C., Seino Y., Senyo K., Seon O., Sevior M. E., Shebalin V., Shen C. P., Shiu J-G, Shwartz B., Simon F., Sokolov A., Solovieva E., Stanic S., Staric M., Stottler Z. S., Strube J. F., Sumiyoshi T., Takizawa M., Tanida K., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno S., Usov Y., Varner G., Varvell K. E., Vinokurova A., Vossen A., Wang C. H., Wang M-Z, Wang P., Won E., Yang S. B., Ye H., Yusa Y., Zhang Z. P., Zhilich V., Zhukova V.

PHYSICAL REVIEW D Vol. 103 ( 7 ) 2021.4

Evidence for X(3872) -> J/Psi pi(+)pi(-) Produced in Single-Tag Two-Photon Interactions

Teramoto Y., Uehara S., Masuda M., Adachi I, Aihara H., Al Said S., Asner D. M., Atmacan H., Aushev T., Ayad R., Babu V, Behera P., Beleno C., Bennett J., Bhardwaj V, Bhuyan B., Bilka T., Biswal J., Bonvicini G., Bozek A., Browder T. E., Campajola M., Chang M-C, Chang P., Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., De Nardo G., Di Capua F., Dolezal Z., Dong T. V, Eidelman S., Ferber T., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Greenwald D., Hadjivasiliou C., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hedges M. T., Villanueva M. Hernandez, Hou W-S, Hsu C-L, Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jang E-J, Jia S., Jin Y., Joo C. W., Joo K. K., Kahn J., Kaliyar A. B., Kang K. H., Karyan G., Kato Y., Kawasaki T., Kichimi H., Kiesling C., Kim B. H., Kim D. Y., Kim S. H., Kim Y-K, Kimmel T. D., Kinoshita K., Kodys P., Korpar S., Kotchetkov D., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lalwani K., Lange J. S., Lee I. S., Lee S. C., Lewis P., Li L. K., Li Y. B., Li Gioi L., Libby J., Lieret K., Liptak Z., Liventsev D., Luo T., MacQueen C., Matsuda T., Matvienko D., Merola M., Miyabayashi K., Miyata H., Mohanty G. B., Mohanty S., Moon T. J., Mori T., Mrvar M., Mussa R., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Natochii A., Nayak M., Nisar N. K., Nishida S., Ogawa K., Ogawa S., Ono H., Onuki Y., 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., Ritter M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schueler J., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Shebalin V, Shiu J-G, Singh J. B., Solovieva E., Stottler Z. S., Sumihama M., Sumisawa K., Sumiyoshi T., Sutcliffe W., Takizawa M., Tamponi U., Tenchini F., Uchida M., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Van Tonder R., Varner G., Vinokurova A., Vorobyev V., Waheed E., Wang C. H., Wang E., Wang M-Z, Wang P., Wang X. L., Watanabe M., Won E., Xu X., Yabsley B. D., Yang S. B., Ye H., Yelton J., Yin J. H., Zhang Z. P., Zhilich V, Zhukova V, Zhulanov V

PHYSICAL REVIEW LETTERS Vol. 126 ( 12 ) 2021.3

Test of lepton flavor universality and search for lepton flavor violation in $B \rightarrow K\ell \ell$ decays Reviewed

Choudhury, S., Sandilya, S., Trabelsi, K., Giri, A., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Beleño, C., Belous, K., Bennett, J., Bernlochner, F., Bessner, M., Bhardwaj, V., Bilka, T., Biswal, J., Bonvicini, G., Bozek, A., Bračko, M., Browder, T.E., Campajola, M., Červenkov, D., Chang, M.-C., Chang, P., Chekelian, V., Chen, A., Cheon, B.G., Chilikin, K., Cho, K., Choi, S.-K., Choi, Y., Cinabro, D., Cunliffe, S., Dash, N., De Nardo, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T.V., Dossett, D., Dubey, S., Eidelman, S., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B.G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Goldenzweig, P., Golob, B., Greenwald, D., Hadjivasiliou, C., Hartbrich, O., Hayashii, H., Hedges, M.T., Hernandez Villanueva, M., Higuchi, T., Hou, W.-S., Hsu, C.-L., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W.W., Jang, E.-J., Jeon, H.B., Jia, S., Jin, Y., Joo, C.W., Joo, K.K., Kahn, J., Kaliyar, A.B., Kang, K.H., Karyan, G., Kichimi, H., Kiesling, C., Kim, B.H., Kim, D.Y., Kim, K.-H., Kim, K.T., Kim, S.H., Kim, Y.-K., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.-J., Lalwani, K., Lee, S.C., Lewis, P., Li, C.H., Li, L.K., Li, Y.B., Li Gioi, L., Libby, J., Lieret, K., Liptak, Z., Liventsev, D., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Merola, M., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Mohanty, S., Moon, T.J., Mori, T., Nakamura, I., Nakamura, K.R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N.K., Nishida, S., Ogawa, K., 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., Rabusov, A., Rostomyan, A., Rout, N., Rozanska, M., Russo, G., Sahoo, D., Sakai, Y., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Schwartz, A.J., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Shebalin, V., Shiu, J.-G., Shwartz, B., Simon, F., Sokolov, A., Solovieva, E., Stanič, S., Starič, M., Stottler, Z.S., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Ushiroda, Y., Van Tonder, R., Varner, G., Varvell, K.E., Vinokurova, A., Vorobyev, V., Waheed, E., Wang, C.H., Wang, E., Wang, M.-Z., Wang, P., Watanabe, M., Watanuki, S., Wehle, S., Wiechczynski, J., Won, E., Xu, X., 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.

JHEP Vol. 03 ( 3 ) page： 105 - 105 2021.3

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

We present measurements of the branching fractions for the decays B → Kμ+μ− and B → Ke+e−, and their ratio (RK), using a data sample of 711 fb−1 that contains 772 × 106BB¯ events. The data were collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. The ratio RK is measured in five bins of dilepton invariant-mass-squared (q2): q2 ∈ (0.1, 4.0), (4.00, 8.12), (1.0, 6.0), (10.2, 12.8) and (> 14.18) GeV2/c4, along with the whole q2 region. The RK value for q2 ∈ (1.0, 6.0) GeV2/c4 is 1.03−0.24+0.28 ± 0.01. The first and second uncertainties listed are statistical and systematic, respectively. All results for RK are consistent with Standard Model predictions. We also measure CP-averaged isospin asymmetries in the same q2 bins. The results are consistent with a null asymmetry, with the largest difference of 2.6 standard deviations occurring for the q2 ∈ (1.0, 6.0) GeV2/c4 bin in the mode with muon final states. The measured differential branching fractions, dℬ /dq2, are consistent with theoretical predictions for charged B decays, while the corresponding values are below the expectations for neutral B decays. We have also searched for lepton-flavor-violating B → Kμ±e∓ decays and set 90% confidence-level upper limits on the branching fraction in the range of 10−8 for B+ → K+μ±e∓, and B0 → K0μ±e∓ modes. [Figure not available: see fulltext.]

DOI： 10.1007/JHEP03(2021)105

Web of Science

Scopus

arXiv

Search for lepton-number- and baryon-number-violating tau decays at Belle

Sahoo D., Mohanty G. B., Trabelsi K., Adachi I, Adamczyk K., Aihara H., Al Said S., Asner D. M., Aushev T., Ayad R., Aziz T., Babu V, Bahinipati S., Behera P., Bennett J., Bessner M., Bhardwaj V, Bilka T., Biswal J., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cao L., Cervenkov D. T., Chang M-C, Chang P., Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., Di Capua F., Dingfelder J., Dolezal Z., Dong T. V, Dubey S., Eidelman S., Epifanov D., Ferber T., Ferlewicz D., Frey A., Fulsom B. G., Garg R., Gaur V, Garmash A., Giri A., Goldenzweig P., Golob B., Guan Y., Gudkova K., Hadjivasiliou C., Halder S., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hedges M. T., Villanueva M. Hernandez, Hou W-S, Hsu C-L, Huang K., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jeon H. B., Jia S., Jin Y., Joo C. W., Joo K. K., Kaliyar A. B., Kang K. H., Karyan G., Kawasaki T., Kichimi H., Kiesling C., Kim D. Y., Kim S. H., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korpar S., Kotchetkov D., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lalwani K., Lee I. S., Lee S. C., Li C. H., Li J., Li L. K., Li Y. B., Libby J., Lieret K., Liventsev D., Luo T., MacNaughton J., Masuda M., Matsuda T., Matvienko D., Merola M., Metzner F., Miyabayashi K., Mizuk R., Mohanty S., Moon T. J., Mussa R., Nakano E., 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., Pang T., Pardi S., Park C. W., Park H., Patra S., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Ritter M., Rohrken M., Rostomyan A., Rout N., Rozanska M., Russo G., Sakai Y., Sandilya S., Santelj L., Sanuki T., Savinov V, Schnell G., Schueler J., Schwanda C., Schwartz A. J., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shen C. P., Shiu J-G, Shwartz B., Simon F., Sokolov A., Solovieva E., Stanic S., Staric M., Stottler Z. S., Strube J. F., Sumiyoshi T., Takizawa M., Tamponi U., Tanida K., Tenchini F., Uchida M., Uehara S., Uglov T., Unno Y., Uno S., Urquijo P., Ushiroda Y., Vahsen S. E., Van Tonder R., Varner G., Vinokurova A., Vorobyev V., Waheed E., Wang C. H., Wang E., Wang M-Z, Wang P., Watanabe M., Watanuki S., Wehle S., Won E., Xu X., Yabsley B. D., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yusa Y., Zhilich V, Zhukova V, Zhulanov V

PHYSICAL REVIEW D Vol. 102 ( 11 ) 2020.12

Search for transitions from (4S) and (5S) to ηb (1S) and ηb (2S) with emission of an ω meson Reviewed International coauthorship International journal

P. Oskin, R. Mizuk, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, G. De Nardo, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, K. Gudkova, C. Hadjivasiliou, T. Hara, O. Hartbrich, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, K. Kumara, Y. J. Kwon, J. S. Lange, S. C. Lee, P. Lewis, C. H. Li, L. K. Li, L. Li Gioi, J. Libby

Physical Review D Vol. 102 ( 9 ) 2020.11

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

Using data collected in the Belle experiment at the KEKB asymmetric-energy e+e- collider we search for transitions (4S)→ηb(1S)ω, (5S)→ηb(1S)ω and (5S)→ηb(2S)ω. No significant signals are observed and we set 90% confidence level upper limits on the corresponding visible cross sections: 0.2 pb, 0.4 pb and 1.9 pb, respectively.

DOI： 10.1103/PhysRevD.102.092011

Web of Science

Scopus

Study of electromagnetic decays of orbitally excited Ξc baryons

J. Yelton, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, C. Beleño, J. Bennett, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, D. Y. Kim, S. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, S. C. Lee, P. Lewis, L. K. Li, Y. B. Li, L. Li Gioi

Physical Review D Vol. 102 ( 7 ) 2020.10

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

Using 980 fb-1 of data collected with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we report a study of the electromagnetic decays of excited charmed baryons Ξc(2790) and Ξc(2815). A clear signal (8.6 standard deviations) is observed for Ξc(2815)0→Ξc0γ, and we measure: B[Ξc(2815)0 → Ξc0γ]B[Ξc(2815)0 → Ξc(2645)+π- → Ξc0π+π-]=0.41±0.05±0.03. We also present evidence (3.8 standard deviations) for the similar decay of the Ξc(2790)0 and measure: B[Ξc(2790)0 → Ξc0γ]B[Ξc(2790)0 → Ξc′+π- → Ξc+γπ-]=0.13±0.03±0.02. The first quoted uncertainties are statistical and the second systematic. We find no hint of the analogous decays of the Ξc(2815)+ and Ξc(2790)+ baryons and set upper limits at the 90% confidence level of: B[Ξc(2815)+ → Ξc+γ]B[Ξc(2815)+ → Ξc(2645)0π+ → Ξc+π-π+]<0.09, and B[Ξc(2790)+ → Ξc+γ]B[Ξc(2790)+ → Ξc′0π+ → Ξc0γπ+]<0.06. Approximate values of the partial widths of the decays are extracted, which can be used to discriminate between models of the underlying quark structure of these excited states.

DOI： 10.1103/PhysRevD.102.071103

Web of Science

Scopus

Performance evaluation of the aerogel RICH counter for the Belle II spectrometer using early beam collision data

Yonenaga M., Adachi I, Burmistrov L., Le Diberder F., Iijima T., Iwata S., Kakimoto S., Kakuno H., Karyan G., Kawai H., Kitamura H., Kawasaki T., Kindo H., Kobayashi M., Kohriki T., Konno T., Korpar S., Krizan P., Kumita T., Kuze K., Lai Y., Mrvar M., Nazaryan G., Nishida S., Nishimura M., Ogawa K., Ogawa S., Pestotnik R., Seljak A., Shoji M., Sumiyoshi T., Tabata M., Tamechika S., Yusa Y., Santelj L.

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS Vol. 2020 ( 9 ) 2020.9

Performance of the Belle II aerogel-based ring-imaging Cherenkov counter system in SuperKEKB 2019 phase 3 operation

Lai Y-T, Adachi I, Burmistrov L., Furui K., Iijima T., Iwata S., Giordano R., Kakuno H., Karyan G., Kawai H., Kawasaki T., Kindo H., Kitamura H., Kobayashi M., Kohriki T., Konno T., Korpar S., Krizan P., Kumita T., Kuze K., Nazaryan G., Nishida S., Nishimura M., Ogawa K., Ogawa S., Pestotnik R., Santelj L., Shoji M., Sumiyoshi T., Tabata M., Tsurufuji M., Waheed E., Yonenaga M., Yusa Y.

JOURNAL OF INSTRUMENTATION Vol. 15 ( 7 ) 2020.7

Measurement of R(D) and R(D*) with a Semileptonic Tagging Method

Caria G, Urquijo P, Adachi I, Aihara H, Al Said S, Asner D. M, Atmacan H, Aushev T, Babu V, Badhrees I, Bahinipati S, Bakich A. M, Behera P, Beleno C, Bennett J, Bhuyan B, Bilka T, Biswal J, Bozek A, Bracko M, Browder T. E, Campajola M, Cervenkov D, Chang P, Cheaib R, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Dash N, De Nardo G, Di Capua F, Di Carlo S, Dolezal Z, Dong T. V, Eidelman S, Epifanov D

PHYSICAL REVIEW LETTERS Vol. 124 ( 16 ) 2020.4

Search for an Invisibly Decaying Z ' Boson at Belle II in e(+)e(-) -> mu(+)mu(-) (e(+/-)mu(-/+)) Plus Missing Energy Final States

Adachi I, Ahlburg P, Aihara H, Akopov N, Aloisio A, Ky N. Anh, Asper D. M, Atmacan H, Aushev T, Aushev V, Aziz T, Babu V, Baehr S, Bambade P, Banerjee Sw, Bansal V, Barrett M, Baudot J, Becker J, Behera P. K, Bennett J. V, Bernieri E, Bernlochner F. U, Bertemes M, Bessner M, Bettarini S, Bianchi F, Biswas D, Bozek A, Bracko M, Branchini P, Briere R. A, Browder T. E, Budano A, Burmistrov L, Bussino S, Campajola M, Cao L, Casarosa G, Cecchi C, Cervenkov D, Chang M

PHYSICAL REVIEW LETTERS Vol. 124 ( 14 ) 2020.4

Belle II aerogel RICH detector

Burmistrov L, Adachi I, Le Diberder F, Dolenec R, Hataya K, Iijima T, Kakimoto S, Kakuno H, Kawai H, Kawasaki T, Kindo H, Kohriki T, Konno T, Korpar S, Krizan P, Kumita T, Lai Y, Machida M, Mrvar M, Nishida S, Noguchi K, Ogawa K, Ogawa S, Pestotnik R, Santelj L, Shoji M, Sumiyoshi T, Tabata M, Tamechika S, Yonenaga M, Yoshizawa M, Yusa Y

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Vol. 958 2020.4

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

The aerogel Ring Imaging CHerenkov counter (ARICH) is the particle identification device installed in the forward region of the Belle II detector at the SuperKEKB accelerator facility in Japan. The first electron–positron collisions at SuperKEKB took place on April 26, 2018, during the so called phase 2 run. The measured performance of the detector based on recorded Bhabha events during phase 2 is presented. We measure a 14 mrad average angular resolution per photon and 10 photons per Bhabha electron in the [6–8] GeV/c momentum range.

DOI： 10.1016/j.nima.2019.05.073

Web of Science

Scopus

Observation of the Radiative Decays of Upsilon(1S) to chi(c1)

Katrenko P, Adachi I, Aihara H, Al Said S, Asner D. M, Aushev T, Badhrees I, Bahinipati S, Behera P, Beleno C, Bennett J, Bhardwaj V, Bhuyan B, Biswal J, Bobrov A, Bonvicini G, Bracko M, Campajola M, Cao L, Cervenkov D, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S. K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Capua F, Di Carlo S, Dolezal Z, Dong T. V, Eidelman S, Epifanov D, Fast J. E, Fulsom B. G, Garg R, Gaur V, Gabyshev N, Garma

PHYSICAL REVIEW LETTERS Vol. 124 ( 12 ) 2020.3

Study of B -> p<(p)over bar>pi pi

Chu K, Wang M. Z, Adachi I, Aihara H, Al Said S, Asner D. M, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bahinipati S, Bakich A. M, Behera P, Beleno C, Bennett J, Bhardwaj V, Bhuyan B, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bracko M, Campajola M, Cao L, Cervenkov D, Chang P, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S. K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Dash N, Di Capua F, Di Carlo S, Dolezal Z, Dong T. V, Eidelma

PHYSICAL REVIEW D Vol. 101 ( 5 ) 2020.3

Search for B+ -> mu(+)nu(mu) and B+ -> mu N+ with inclusive tagging

Prim M. T, Bernlochner F. U, Prim F, U. M. T, Goldenzweig P, Heck M, Adachi I, Adamczyk K, Aihara H, Al Said S, Asner D. M, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Bakich A. M, Bansal V, Behera P, Beleno C, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bozek A, Bracko M, Braun N, Browder T. E, Campajola M, Cao L, Cervenkov D, Chang P, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Doleza

PHYSICAL REVIEW D Vol. 101 ( 3 ) 2020.2

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER PHYSICAL SOC

We report the result for a search for the leptonic decay of B+ -> mu(+)nu mu using the full Belle dataset of 711 fb(-1) of integrated luminosity at the gamma(4S) resonance. In the Standard Model leptonic B-meson decays are helicity and Cabibbo-Kobayashi-Maskawa suppressed. To maximize sensitivity an inclusive tagging approach is used to reconstruct the second B meson produced in the collision. The directional information from this second B meson is used to boost the observed mu into the signal B-meson rest frame, in which the mu has a monochromatic momentum spectrum. Though its momentum is smeared by the experimental resolution, this technique improves the analysis sensitivity considerably. Analyzing the mu momentum spectrum in this frame we find B(B+ -> mu(+)nu mu)=(5.3 +/- 2.0 +/- 0.9) x 10(-7) with a one-sided significance of 2.8 standard deviations over the background-only hypothesis. This translates to a frequentist upper limit of B(B+ -> mu(+)nu mu) < 8.6 x 10(-7) at 90% confidence level. The experimental spectrum is then used to search for a massive sterile neutrino, B+ -> mu N+, but no evidence is observed for a sterile neutrino with a mass in a range of 01.5 GeV. The determined B+ -> mu(+)nu mu branching fraction limit is further used to constrain the mass and coupling space of the type II and type III two-Higgs-doublet models.

DOI： 10.1103/PhysRevD.101.032007

Web of Science

Development of a bunch-width monitor for low-intensity muon beam below a few MeV

Sue Yuki, Yotsuzuka Mai, Futatsukawa Kenta, Hasegawa Kazuo, Iijima Toru, Iinuma Hiromi, Inami Kenji, Ishida Katsuhiro, Kawamura Naritoshi, Kitamura Ryo, Kondo Yasuhiro, Mibe Tsutomu, Miyake Yasuhiro, Morishita Takatoshi, Nakazawa Yuga, Otani Masashi, Saito Naohito, Shimomura Koichiro, Takeuchi Yusuke, Ushizawa Takahiro, Yamazaki Takayuki, Yasuda Hiromasa

PHYSICAL REVIEW ACCELERATORS AND BEAMS Vol. 23 ( 2 ) 2020.2

Performance and commissioning of HAPDs in the Aerogel RICH counter

Yonenaga Masanobu, Adachi Ichiro, Burmistrov Leonid, Le Diberder Francois, Dolenec Rok, Hataya Koki, Iijima Toru, Kakimoto Shiori, Kakuno Hidekazu, Kawai Hideyuki, Kawasaki Takeo, Kindo Haruki, Kohriki Takashi, Konno Tomoyuki, Korpar Samo, Krizan Peter, Kumita Tetsuro, Lai Yun-Tsung, Machida Masahiro, Mrvar Manca, Nishida Shohei, Noguchi Kouta, Ogawa Kazuya, Ogawa Satoru, Pestotnik Rok, Santelj Luka, Shoji Masayoshi, Sumiyoshi Takayuki, Tabata Makoto, Tamechika Sachi, Yoshizawa Morihito, Yusa Yo

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Vol. 952 2020.2

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

The Belle II Aerogel Ring Imaging Cherenkov (ARICH) counter uses the angular distribution of Cherenkov photons emitted in silica aerogel to discriminate between charged pions and kaons. The Hybrid Avalanche Photo Detector (HAPD) is used as the photo-sensor, and is clearly the most critical component of the detector. HAPDs were installed into ARICH in July 2017, and ARICH was installed in the Belle II spectrometer in the end of 2017. During the Belle II beam commissioning in spring 2018, the performance of HAPDs was evaluated through measurements of the offset value, noise level and pulse height. Long term stability of the signal-to-noise ratio and the fraction of dead channel was also monitored. The signal-to-noise ratio exceeded 6, and the fraction of dead channels was less than 1%. The results of the performance evaluation and of the commissioning showed that the ARICH counter fulfills the requirements.

DOI： 10.1016/j.nima.2019.06.005

Web of Science

Operational status of the Belle II Time-Of-Propagation counter readout and data acquisition system

Maeda Y, Andrew M, Atmacan H, Bessner M, Gaz A, Hartbrich O, Hirata H, Iijima T, Inami K, Macchiarulo L, Matsuoka K, Muroyama G, Neverov D, Nisar N. K, Nishimura K, Okuto R, Savinov V, Senga S, Suzuki K, Tsuzuki N, Varner G. S

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Vol. 952 2020.2

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