研究者詳細 - 居波　賢二

論文 - 居波　賢二

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The imaging Time-of-Propagation detector at Belle II 査読有り国際共著

Atmacan, H; Belhorn, M; Guan, Y; Li, L; Pal, B; Sandilya, S; Schwartz, AJ; Wang, B; Watanuki, S; Andrew, M; Barrett, M; Bessner, M; Browder, TE; Bynes, J; Cercillieux, J; Dubey, S; Hartbrich, O; Ketter, C; Kirby, B; Kohani, S; Kotchetkov, D; Macchiarulo, L; Macek, B; Nishimura, K; Purwar, H; Sang, Z; Shebalin, V; Tripathi, S; Varner, G; Yoshihara, K; Kohriki, T; Wang, X; Maharana, SP; Vismaya, VS; Visser, G; Gaz, A; Lacaprara, S; Stroili, R; Torassa, E; Mussa, R; Tamponi, U; Krizan, P; Korpar, S; Nanut, T; Novosel, A; Petri, M; Rizzuto, L; Staric, M; Cremaldi, LM; Sanders, DA; Adachi, Y; Arita, Y; Furumura, D; Hara, S; Hayakawa, T; Hirose, S; Horii, Y; Iijima, T; Inami, K; Ito, Y; Kato, Y; Kiribe, N; Koga, R; Kojima, K; Maeda, A; Maeda, Y; Maehara, K; Maeshima, R; Matsuoka, K; Muroyama, G; Nakano, T; Okubo, R; Okuto, R; Omori, R; Senga, S; Suzuki, K; Takeichi, H; Tsuzuki, N; Yonekura, T; Conrad, R; Fast, J; Fulsom, B; Strube, J; Wood, L; Danko, I; Gu, T; Herring, N; Nisar, NK; Roffe, S; Savinov, V; Wang, E; Bhardwaj, V; Loos, A; Purohit, M; Rosenfeld, C

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 1080 巻 2025年11月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

We report on the construction, operation, and performance of the Time-of-Propagation detector with imaging used for the Belle II experiment running at the Super-KEKB e+e− collider. This detector is located in the central barrel region and uses Cherenkov light to provide particle identification among hadrons. The Cherenkov light is radiated in highly polished bars of synthetic fused silica (quartz) and transported to the ends of the bars via total internal reflection. One bar end is instrumented with finely segmented micro-channel-plate photomultiplier tubes to record the light, while the other end has a mirror attached to reflect the photons back to the instrumented end. Both the propagation times and hit positions of the Cherenkov photons are measured; these depend on the Cherenkov angle and together provide good discrimination among charged pions, kaons, and protons with momenta up to around 4 GeV/c. To date, the detector has been used to record and analyze almost 600 fb−1 of Belle II data.

DOI： 10.1016/j.nima.2025.170627

Web of Science

Scopus

An improved search for the electric dipole moment of the tau lepton 査読有り国際共著 Open Access

Inami K., Hayasaka K., Adachi I, Aihara H., Al Said S., Asner D. M., Aulchenko V, Aushev T., Ayad R., Babu V, Bahinipati S., Behera P., Bessner M., Bhuyan B., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cervenkov D., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., De Nardo G., Dhamija R., Di Capua F., Dolezal Z., Dong T. V, Dubey S., Eidelman S., Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Golob B., Greenwald D., Gudkova K., Hadjivasiliou C., Hartbrich O., Hayashii H., Hedges M. T., Hou W-S, Hsu C-L, Iijima T., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jang E-J, Jin Y., Joo C. W., Joo K. K., Kato Y., Kawasaki T., Kichimi H., Kiesling C., Kim C. H., Kim D. Y., Kim S. H., Kim Y-K, Kimmel T. D., Kinoshita K., Kodys P., Konno T., Korpar S., Krizan P., Kroeger R., Krokovny P., Kulasiri R., Kumar M., Kumar R., Kumara K., Kwon Y-J, Lalwani K., Lange J. S., Lee S. C., Li C. H., Li J., Li L. K., Li Y. B., Li Gioi L., Libby J., Liventsev D., MacQueen C., Masuda M., Matsuda T., Matvienko D., Merola M., Metzner F., Miyabayashi K., Mizuk R., Mohanty G. B., Mohanty S., Moon T. J., Nakao M., Natochii A., Nayak L., Nayak M., Nisar N. K., Nishida S., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park S-H, Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Rabusov A., Rohrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shiu J-G, Shwartz B., Simon F., Solovieva E., Staric M., Stottler Z. S., Strube J. F., Sumisawa K., Sutcliffe W., Takizawa M., Tamponi U., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uchida M., Uehara S., Uno S., Ushiroda Y., Van Tonder R., Varner G., Vinokurova A., Wang C. H., Wang E., Wang P., Watanabe M., Watanuki S., Won E., Xu X., Yabsley B. D., Yan W., Yang S. B., Ye H., Yin J. H., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V

JOURNAL OF HIGH ENERGY PHYSICS ( 4 ) 2022年4月

Search for lepton-flavor-violating tau-lepton decays to l gamma at Belle 査読有り国際共著 Open Access

Uno K., Hayasaka K., Inami K., Adachi I, Aihara H., Asner D. M., Atmacan H., Aushev T., Ayad R., Babu V, Bennett J., Bernlochner F., Bessner M., Bhardwaj V, Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Campajola M., Cervenkov D., Chang M-C, Cho H. E., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Dash N., Di Capua F., Dingfelder J., Dolezal Z., Dong T. V, Eidelman S., Epifanov D., Ferber T., Frey A., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Hadjivasiliou C., Hara T., Hartbrich O., Hayashii H., Villanueva M. Hernandez, Hou W-S, Hsu C-L, Iijima T., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Jacobs W. W., Jin Y., Joo K. K., Kang K. H., Kato Y., Kichimi H., Kiesling C., Kim C. H., Kim D. Y., Kim K-H, Kim S. H., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lai Y-T, Lange J. S., Lee S. C., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., MacQueen C., Masuda M., Matsuoka K., Matvienko D., Merola M., Metzner F., Miyabayashi K., Mizuk R., Mohanty G. B., Nakao M., Nakazawa H., Natochii A., Nayak L., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa K., Ogawa S., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park H., Park S-H, Paul S., Pestotnik R., Piilonen L. E., Podobnik T., Prencipe E., Prim M. T., Rohrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schwanda C., Seino Y., Senyo K., Sevior M. E., Sharma C., Shen C. P., Shiu J-G, Shwartz B., Simon F., Sokolov A., Solovieva E., Staric M., Stottler Z. S., Sumihama M., Sumiyoshi T., Sutcliffe W., Takizawa M., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uchida M., Uehara S., Uglov T., Unno Y., Uno S., Urquijo P., Ushiroda Y., Usov Y., Vahsen S. E., Van Tonder R., Varner G., Vinokurova A., Vossen A., Waheed E., Wang C. H., Wang E., Wang M-Z, Wang X. L., Werbycka O., Won E., Yabsley B. D., Yan W., Ye H., Yin J. H., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V

JOURNAL OF HIGH ENERGY PHYSICS ( 10 ) 2021年10月

Extension of the MCP-PMT lifetime 査読有り国際共著

Matsuoka K., Hirose S., Iijima T., Inami K., Kato Y., Kobayashi K., Maeda Y., Omori R., Suzuki K.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 876 巻頁： 93-95 2017年12月

MCP-PMT timing property for single photons 査読有り国際共著

M. Akatsu, Y. Enari,K. Hayasaka, T. Hokuue, T. Iijima,K. Inami, K. Itoh, S. Kawakami, N. Kishimoto, T. Kubota, M. Kojima, Y. Kozakai, Y. Kuriyama, T. Matsuishi, Y. Miyabayashi, T. Ohshima, N. Sato, K. Senyo, A. Sugi, S. Tokuda, M. Tomita, H. Yanase, S. Yoshino

Nucl. Instr. and Meth. A 528 巻頁： 768-775 2004年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

We have measured the performance, especially the timing properties, of micro-channel plate photo-multiplier tubes (MCP-PMTs) by irradiating with single photons with/without a magnetic field. A time resolution of sigma=30-35ps was obtained for single photons under 1.5 T.
With an MCP-PMT, a small Time-Of-Flight counter, by means of Cherenkov light radiation instead of scintillation light has been prepared, and a time resolution sigma~10ps was attained for a high-energy pi-beam by multiple photons.

DOI： 10.1016/j.nima.2004.04.207

Upper bound on the decay tau -> mu gamma from the Belle detector 査読有り国際共著 Open Access

Belle collaboration

Physical Review Letters 92 巻頁： 171802-1-6 2004年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

We have performed a search for the lepton-flavor-violating decay tau->mu gamma using a data sample of 86.3 fb–1 accumulated by the Belle detector at KEK. No evidence for a signal is seen, and we set an upper limit for the branching fraction of B(tau->mu gamma)<3.1×10–7 at the 90% confidence level.

DOI： 10.1103/PhysRevLett.92.171802

Open Access

SEARCH FOR THE ELECTRIC DIPOLE MOMENT OF THE TAU LEPTON 査読有り国際共著 Open Access

K. Inami et al., (Belle Collaboration)

Physics letters B 551 巻頁： 16-26 2003年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

We have searched for a CP violation signature arising from
an electric dipole moment, d_tau of the tau lepton in the
e+e- -> tau+tau- reaction. Using an optimal observable
method and 29.5 fb^-1 of data collected with the Belle
detector at the KEKB collider, we find
Re(d_tau) = ( 1.15 +- 1.70 ) x 10^{-17} ecm and
Im(d_tau) = ( -0.83 +- 0.86 ) x 10^{-17} ecm
and set the 95% confidence level limits
-2.2 < Re(d_tau) < 4.5 (10^{-17} ecm) and
-2.5 < Im(d_tau) < 0.8 (10^{-17} ecm).

DOI： 10.1016/S0370-2693(02)02984-2

Open Access

Measurement of inclusive (Formula presented) partial branching fractions and |Vub| at Belle II Open Access

Abumusabh M., Adachi I., Adamczyk K., Aggarwal L., Ahmed H., Ahn Y., Aihara H., Akopov N., Alghamdi S., Alhakami M., Aloisio A., Althubiti N., Amos K., Anh Ky N., Antonioli C., Asner D.M., Atmacan H., Aushev T., Ayad R., Babu V., Bae H., Baghel N.K., Bahinipati S., Bambade P., Banerjee S., Barrett M., Bartl M., Baudot J., Beaubien A., Becherer F., Becker J., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhardwaj V., Bhuyan B., Bianchi F., Bilka T., Biswas D., Bobrov A., Bodrov D., Bonvicini G., Borah J., Boschetti A., Bozek A., Bračko M., Branchini P., Briere R.A., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Chang P., Cheema P., Chen L., Cheon B.G., Cheshta C., Chetri H., Chilikin K., Chin J., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Chutia S., Cochran J., Colorado-Caicedo J.A., Consigny I., Corona L., Cui J.X., De La Cruz-Burelo E., De La Motte S.A., De Nardo G., De Pietro G., de Sangro R., Destefanis M., Dey S., Di Canto A., Dingfelder J., Doležal Z., Domínguez Jiménez I., Dong T.V., Dong X., Dorigo M., Dujany G., Ecker P., Eppelt J., Farkas R., Feichtinger P., Ferber T.

Physical Review D 113 巻 ( 3 ) 頁： 1 - 23 2026年2月

出版者・発行元：Physical Review D

A sample of 365 fb−1 of (Formula presented) data collected by the Belle II experiment is used to measure the partial branching fractions of charmless semileptonic B meson decays and determine the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element V<inf>ub</inf>. Events containing a signal electron or muon l and a fully reconstructed hadronic B decay that constrains the signal kinematics are selected, while the rest of the event defines the hadronic system X<inf>u</inf> associated with the signal. To discriminate the signal from the 50-times larger background originating from CKM-favored semileptonic B decays, a template fit is performed in both signal and control regions after applying an optimized selection. The partial branching fraction measured for lepton energies greater than 1 GeV in the signal B meson rest frame is (Formula presented). From this measurement, using the Gambino, Giordano, Ossola, Uraltsev theoretical framework, (Formula presented) is determined, where the uncertainties are experimental and theoretical, respectively. This value is consistent with the world average obtained from previous inclusive measurements. Different theoretical predictions and partial branching fractions measured in other phase-space regions, defined by additional selections on the X<inf>u</inf> and leptonic system masses, are also used to determine jV<inf>ub</inf>j. This allows for a comparison of the resulting values across theoretical frameworks and phase-space regions.

DOI： 10.1103/59ws-zxbt

Open Access

Scopus

Determination of |Vcb| using B → Dℓνl decays at Belle II Open Access

Adachi I., Adamczyk K., Aggarwal L., Ahmed H., Ahn Y., Aihara H., Akopov N., Alghamdi S., Alhakami M., Aloisio A., Amos K., Angelsmark M., AnhKy N., Antonioli C., Asner D.M., Atmacan H., Aushev T., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Baghel N.K., Bahinipati S., Bambade P., Banerjee S., Barrett M., Bartl M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., 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., Bondar A., Bonvicini G., Borah J., Boschetti A., Bozek A., Bračko M., Branchini P., Briere R.A., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Chang M.C., Cheema P., Chen L., Cheon B.G., Chilikin K., Chin J., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Consigny I., Corona L., Cui J.X., De La Cruz-Burelo E., De La Motte S.A., De Pietro G., de Sangro R., De stefanis M., Di Canto A., Dingfelder J., Doležal Z., Jiménez I.D., Dong T.V., Dong X., Dugic K., Dujany G., Ecker P., Eppelt J., Farkas R., Feichtinger P., Ferber T., Fillinger T., Finck C., Finocchiaro G., Forti F., Frey A.

Physical Review D 112 巻 ( 11 ) 頁： 1120091 - 11200915 2025年12月

出版者・発行元：Physical Review D

We present a determination of the Cabibbo-Kobayashi-Maskawa matrix element |V<inf>cb</inf>| from the decay B → Dℓν<inf>ℓ</inf> using a 365 fb-1 e+e- → ϒ(4S) → BB¯ data sample recorded by the Belle II experiment at the SuperKEKB collider. The semileptonic decay of one B meson is reconstructed in the modes B0 → D−(→ K+π−π−)ℓ+ν<inf>ℓ</inf> and B+ → D¯0( → K+π−)ℓ+ν<inf>ℓ</inf>, where ℓ denotes either an electron or a muon. Charge conjugation is implied. The second B meson in the ϒ(4S) event is not reconstructed explicitly. Using an inclusive reconstruction of the unobserved neutrino momentum, we determine the recoil variable w = v<inf>B</inf>·v<inf>D</inf>, where v<inf>B</inf> and v<inf>D</inf> are the four-velocities of the B and D mesons. We measure the total decay branching fractions to be B(B0 → D−ℓ+ν<inf>ℓ</inf>) = (2.06 ± 0.05(stat) ± 0.10(sys))% and B(B+ → D¯0ℓ+ν<inf>ℓ</inf>) = (2.31 ± 0.04(stat) ± 0.09(sys))%. We probe lepton flavor universality by measuring B(B → Deν<inf>e</inf>)/B(B → Dμν<inf>μ</inf>) = 1.020 ± 0.020(stat) ± 0.022(sys). Fitting the partial decay branching fraction as a function of w and using the average of lattice QCD calculations of the B → D form factor, we obtain |V<inf>cb</inf>| = (39.2 ± 0.4(stat) ± 0.6(sys) ± 0.5(th)) × 10−3.

DOI： 10.1103/vs8k-259v

Open Access

Scopus

Search for the lepton-flavor-violating τ− → e∓ℓ±ℓ− decays at Belle II 査読有り国際共著国際誌 Open Access

Adachi I., Aggarwal L., Ahmed H., Ahn Y., Aihara H., Akopov N., Alghamdi S., Alhakami M., Aloisio A., Althubiti N., Amos K., Angelsmark M., Anh Ky N., Antonioli C., Asner D.M., Atmacan H., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Baghel N.K., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Bartl M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhardwaj V., Bhuyan B., Bianchi F., Bilka T., Biswas D., Bobrov A., Bodrov D., Bondar A., Bonvicini G., Borah J., Boschetti A., Bozek A., Bračko M., Branchini P., Brenny N., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Chang M.C., Cheaib R., Cheema P., Chen C., Chen L., Cheon B.G., Chilikin K., Chin J., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Cochran J., Consigny I., Corona L., Cui J.X., De La Cruz-Burelo E., De La Motte S.A., De Nardo G., De Pietro G., de Sangro R., Destefanis M., Dey S., Di Canto A., Di Capua F., Dingfelder J., Doležal Z., Domínguez Jiménez I., Dong T.V., Dong X., Dorigo M., Dugic K., Dujany G., Ecker P., Epifanov D.

Journal of High Energy Physics 2025 巻 ( 12 ) 2025年12月

記述言語：英語出版者・発行元：Journal of High Energy Physics

We present the result of a search for the charged-lepton-flavor violating decays τ− → e∓ℓ±ℓ−, where ℓ is a muon or an electron, using a data sample with an integrated luminosity of 428 fb−1 recorded by the Belle II experiment at the SuperKEKB e+e− collider. The selection of e+e− → τ+τ− events containing a signal candidate is based on an inclusive-tagging reconstruction and on a boosted decision tree to suppress background. Upper limits on the branching fractions between 1.3 and 2.5 × 10−8 are set at the 90% confidence level. These results are the most stringent bounds to date for four of the modes.

DOI： 10.1007/JHEP12(2025)169

Open Access

Scopus

Search for an axion-like particle in B → K(*)a(→ γγ) decays at Belle 査読有り国際共著国際誌 Open Access

Adachi I., Aggarwal L., Ahmed H., Ahn Y., Aihara H., Akopov N., Alghamdi S., Alhakami M., Aloisio A., Althubiti N., Amos K., Angelsmark M., Anh Ky N., Antonioli C., Asner D.M., Atmacan H., Aushev T., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Baghel N.K., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Bartl M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., 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., Bondar A., Bonvicini G., Borah J., Boschetti A., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Chang M.C., Cheema P., Chen L., Cheon B.G., Chilikin K., Chin J., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Cochran J., Consigny I., Corona L., Cui J.X., De La Cruz-Burelo E., De La Motte S.A., De Nardo G., De Pietro G., de Sangro R., Destefanis M., Dey S., Di Canto A., Dingfelder J., Doležal Z., Domínguez Jiménez I., Dong T.V., Dugic K., Dujany G., Ecker P., Eppelt J., Farkas R., Feichtinger P., Ferber T., Fillinger T., Finck C., Finocchiaro G.

Journal of High Energy Physics 2025 巻 ( 12 ) 2025年12月

記述言語：英語出版者・発行元：Journal of High Energy Physics

We report a search for an axion-like particle a in B → K(*)a decays using data collected with the Belle detector at the KEKB asymmetric-energy electron-positron collider. The search is based on a 711 fb−1 data sample collected at the Υ(4S) resonance energy, corresponding to a sample of 772 × 106 Υ(4S) events. In this study, we search for the decay of the axion-like particle into a pair of photons, a → γγ. We scan the two-photon invariant mass in the range 0.16 GeV–4.50 GeV for the K modes and 0.16 GeV–4.20 GeV for the K* modes. No significant signal is observed in any of the modes, and 90% confidence level upper limits are established on the coupling to the W boson, g<inf>aW</inf>, as a function of a mass. The limits range from 3 × 10−6 GeV−1 to 3 × 10−5 GeV−1, improving the current constraints on g<inf>aW</inf> by a factor of two over the most stringent previous experimental results.

DOI： 10.1007/JHEP12(2025)109

Open Access

Scopus

Model-agnostic likelihood for the reinterpretation of the [Presented Formula] measurement at Belle II Open Access

Abumusabh M., Adachi I., Aggarwal L., Ahmed H., Ahn Y., Akopov N., Alghamdi S., Alhakami M., Aloisio A., Althubiti N., Amos K., Anh Ky N., Asner D.M., Atmacan H., Ayad R., Babu V., Bae H., Baghel N.K., Bambade P., Banerjee S., Barrett M., Bartl M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhardwaj V., Bhuyan B., Bianchi F., Biswas D., Bodrov D., Bondar A., Bonvicini G., Borah J., Boschetti A., Bozek A., Bracko M., Branchini P., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Chang M.C., Cheema P., Chen L., Cheon B.G., Chilikin K., Chin J., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Corona L., Cui J.X., De La Cruz-Burelo E., De La Motte S.A., de Marino G., De Nardo G., De Pietro G., de Sangro R., Destefanis M., Dey S., Dingfelder J., Dolezal Z., Dong T.V., Dong X., Dugic K., Dujany G., Ecker P., Farkas R., Ferber T., Fillinger T., Finck C., Finocchiaro G., Forti F., Frey A., Fulsom B.G., Gabrielli A., Gale A., Ganiev E., Garcia-Hernandez M., Garg R., Gärtner L., Gaudino G., Gaur V., Gautam V.

Physical Review D 112 巻 ( 9 ) 頁： 1 - 10 2025年11月

出版者・発行元：Physical Review D

We recently measured the branching fraction of the [Presented Formula]> decay using 362 fb−1 of on-resonance e+e− collision data under the assumption of Standard Model kinematics, providing the first evidence for this decay. To facilitate future reinterpretations and maximize the scientific impact of this measurement, we publicly release the full analysis likelihood along with all necessary material required for reinterpretation under arbitrary theoretical models sensitive to this measurement. In this work, we demonstrate how the measurement can be reinterpreted within the framework of the weak effective theory. Using a kinematic reweighting technique in combination with the published likelihood, we derive marginal posterior distributions for the Wilson coefficients, construct credible intervals, and assess the goodness of fit to the Belle II data. For the weak effective theory Wilson coefficients, the posterior mode of the magnitudes [Presented Formula], and [Presented Formula] corresponds to the point (11.3, 0.0, 8.2). The respective 95% credible intervals are [1.9, 16.2], [0.0, 15.4], and [0.0, 11.2].

DOI： 10.1103/pr66-sd36

Open Access

Scopus

The anomalous magnetic moment of the muon in the Standard Model: an update Open Access

Aliberti, R; Aoyama, T; Balzani, E; Bashir, A; Benton, G; Bijnens, J; Biloshytskyi, ; Blum, T; Boito, D; Bruno, M; Budassi, E; Burri, S; Cappiello, L; Calame, CMC; Cè, M; Cirigliano, V; Clarke, DA; Colangelo, G; Cotrozzi, L; Cottini, M; Danilkin, I; Davier, M; Della Morte, M; Denig, A; Detar, C; Druzhinin, ; Eichmann, G; El-Khadra, AX; Estrada, E; Feng, X; Fischer, CS; Frezzotti, R; Gagliardi, G; Gerardin, A; Ghilardi, M; Giusti, D; Golterman, M; Gonzàlez-Solis, S; Gottlieb, S; Gruber, R; Guevara, A; Gülpers, V; Gurgone, A; Hagelstein, F; Hayakawa, M; Hermansson-Truedsson, N; Hoecker, A; Hoferichter, M; Hoid, BL; Holz, S; Hudspith, RJ; Ignatov, F; Jin, L; Kalntis, N; Kanwar, G; Keshavarzi, A; Komijani, J; Koponen, J; Kuberski, S; Kubis, B; Kupich, A; Kupsc, A; Lahert, S; Laporta, S; Lehner, C; Lellmann, M; Lellouch, L; Leplumey, T; Leutgeb, J; Lin, T; Liu, Q; Logashenko, I; London, CY; Castro, GL; Lüdtke, J; Lusiani, A; Lutz, A; Mager, J; Malaescu, B; Maltman, K; Marinkovic, MK; Márquez, J; Masjuan, P; Meyer, HB; Mibe, T; Miller, N; Miramontes, A; Miranda, A; Montagna, G; Mueller, SE; Neil, ET; Nesterenko, AV; Nicrosini, O; Nio, M; Nomura, D; Paltrinieri, J; Parato, L; Parrino, J; Pascalutsa, V; Passera, M; Peris, S; Rosàs, PP; Piccinini, F; Pilato, RN; Polat, L; Portelli, A; Portillo-Sánchez, D; Procura, M; Punzi, L; Raya, K; Rebhan, A; Redmer, CF; Roberts, BL; Rodriguez-Sánchez, A; Roig, P; de Elvira, JR; Sánchez-Puertas, P; Signer, A; Sitison, JW; Stamen, D; Stöckinger, D; Stöckinger-Kim, H; Stoffer, P; Sue, Y; Tavella, P; Teubner, T; Toelstede, JN; Toledo, G; Bobadilla, WJT; Tsang, JT; Ucci, FP; Ulrich, Y; van de Water, RS; Venanzoni, G; Volkov, S; von Hippel, G; Wang, G; Wenger, U; Wittig, H; Wright, A; Zaid, E; Zanke, M; Zhang, Z; Zillinger, M; Alexandrou, C; Altherr, A; Anderson, M; Aubin, C; Bacchio, S; Beltrame, P; Beltran, A; Boyle, P; Plasencia, IC; Caprini, I; Chakraborty, B; Chanturia, G; Crivellin, A; Czarnecki, A; Dai, LY; Dave, T; Del Debbio, L; Demory, K; Djukanovic, D; Draper, T; Driutti, A; Endo, M; Erben, F; Ferraby, K; Finkenrath, J; Flower, L; Francis, A; Gámiz, E; Gogniat, J; Grebe, AV; Gündogdu, S; Hansen, MT; Hashimoto, S; Hayashii, H; Hertzog, DW; Heuser, LA; Hostetler, L; Hou, XT; Huang, GS; Iijima, T; Inami, K; Jüttner, A; Kitano, R; Knecht, M; Kollatzsch, S; Kronfeld, AS; Lenz, T; Levati, G; Li, QM; Liao, YP; Libby, J; Liu, KF; Lubicz, V; Lynch, MT; Lytle, AT; Ma, JL; Miura, K; Möhling, K; Muskalla, J; Noël, F; Ottnad, K; Paradisi, P; Peterson, CT; Pich, A; Pitelis, S; Plura, S; Price, A; Radic, D; Radzhabov, A; Risch, A; Romiti, S; Sahoo, S; Sannino, F; Schäfer, H; Schelhaas, Y; Serednyakov, SI; Shekhovtsova, O; Simone, JN; Simula, S; Solodov, EP; Stokes, FM; Vanderhaeghen, M; Vaquero, A; Vestergaard, N; Wang, WP; Was, Z; Yamashita, K; Yang, YB; Yoshioka, T; Zhevlakov, AS; Yuan, CZ

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS 1143 巻頁： 1 - 158 2025年11月

出版者・発行元：Physics Reports

We present the current Standard Model (SM) prediction for the muon anomalous magnetic moment, a<inf>μ</inf>, updating the first White Paper (WP20) [1]. The pure QED and electroweak contributions have been further consolidated, while hadronic contributions continue to be responsible for the bulk of the uncertainty of the SM prediction. Significant progress has been achieved in the hadronic light-by-light scattering contribution using both the data-driven dispersive approach as well as lattice-QCD calculations, leading to a reduction of the uncertainty by almost a factor of two. The most important development since WP20 is the change in the estimate of the leading-order hadronic-vacuum-polarization (LO HVP) contribution. A new measurement of the e+e−→π+π− cross section by CMD-3 has increased the tensions among data-driven dispersive evaluations of the LO HVP contribution to a level that makes it impossible to combine the results in a meaningful way. At the same time, the attainable precision of lattice-QCD calculations has increased substantially and allows for a consolidated lattice-QCD average of the LO HVP contribution with a precision of about 0.9%. Adopting the latter in this update has resulted in a major upward shift of the total SM prediction, which now reads a<inf>μ</inf>SM=116592033(62)×10−11 (530ppb). When compared against the current experimental average based on the E821 experiment and runs 1–6 of E989 at Fermilab, one finds a<inf>μ</inf>exp−a<inf>μ</inf>SM=38(63)×10−11, which implies that there is no tension between the SM and experiment at the current level of precision. The final precision of E989 (127 ppb) is the target of future efforts by the Theory Initiative. The resolution of the tensions among data-driven dispersive evaluations of the LO HVP contribution will be a key element in this endeavor.

DOI： 10.1016/j.physrep.2025.08.002

Open Access

Web of Science

Scopus

Charged-hadron identification at Belle II Open Access

Žlebčík R., Zhu L., Zhou Q.D., Zhou J.S., Zhang B., Zeyrek M., Zeng F., Zani L., Yusa Y., Yuan J., Yoshihara K., Yin J.H., Yi K., Yelton J., Yang S.B., Yan W.C., Yan W., Yamada S., Yabsley B.D., Xu X.P., Won E., Wessel C., Watanuki S., Watanabe M., Warburton A., Wang Z., Wang M.Z., Wallner S., Wakai M., Vossen A., Volpe R., Vobbilisetti V., Vitale L., Vismaya V.S., Veronesi M., Varvell K.E., Tonder R.v., Vahsen S.E., Ushiroda Y., Urquijo P., Uno S., Uno K., Unno Y., Unger K., Uglov T., Uenlue E., Ueda I., Tsaklidis I., Trantou F.F., Trabelsi K., Torassa E., Tiwary R., Tittel O., Testa F., Tenchini F., Tanida K., Tamponi U., Takizawa M., Takahashi M., Svidras H., Suwonjandee N., Sumisawa K., Sumihama M., Sue Y., Stroili R., Stefkova S., Stavroulakis P., Starič M., Spruck B., Spataro S., Solovieva E., Sokolov A., Soffer A., Sobotzik M., Sobie R.J., Skorupa J., Singh J.B., Simon F., Simo X., Sibidanov A., Shtol D., Shiu J.G., Shillington T., Shi X.D., Shan W., Sfienti C., Sevior M.E., Serrano J., Senyo K., Selce A., Seino Y., Schwartz A.J., Schwanda C., Schnepf M., Schneider S., Schmitz J., Scavino B., Savinov V., Santelj L., Sandilya S.

European Physical Journal C 85 巻 ( 11 ) 2025年11月

出版者・発行元：European Physical Journal C

The Belle II experiment’s ability to identify particles critically affects the sensitivity of its measurements. We describe Belle II’s algorithms for identifying charged particles and evaluate their performance in separating pions, kaons, and protons using 426fb-1 of data collected at the energy-asymmetric e+e- collider SuperKEKB in 2019–2022 at center-of-mass energies at and near the mass of the Υ(4S).

DOI： 10.1140/epjc/s10052-025-14627-7

Open Access

Scopus

Measurement of the D0 → K−π+e+e− branching fraction and search for D0 → π+π−e+e− and D0 → K+K−e+e− decays at Belle

Adachi I., Aggarwal L., Ahmed H., Ahn Y., Aihara H., Akopov N., Alghamdi S., Alhakami M., Aloisio A., Althubiti N., Amos K., Angelsmark M., Anh Ky N., Antonioli C., Asner D.M., Atmacan H., Aushev T., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Baghel N.K., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Bartl M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhardwaj V., Bhuyan B., Bianchi F., Bierwirth L., Bilka T., Biswas D., Bobrov A., Bodrov D., Bolz A., Bondar A., Borah J., Boschetti A., Bozek A., Bračko M., Branchini P., Brenny N., Briere R.A., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Chang P., Cheaib R., Cheema P., Chen C., Chen L., Cheon B.G., Chilikin K., Chin J., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Cochran J., Consigny I., Corona L., Cui J.X., De La Cruz-Burelo E., De La Motte S.A., de Marino G., De Nardo G., De Pietro G., de Sangro R., Destefanis M., Dey S., Dhamija R., Di Canto A., Di Capua F., Dingfelder J., Doležal Z., Jiménez I.D.

Physical Review D 112 巻 ( 7 ) 2025年10月

出版者・発行元：Physical Review D

We present a study of the rare charm meson decays D0 → KþK−eþe−, πþπ−eþe−, and K−πþeþe− using a 942 fb−1 dataset collected by the Belle detector at the KEKB asymmetric-energy eþe− collider. We identify D0 candidates via the charge of the pion from D*þ → D0πþ decays and normalize the branching fractions to D0 → K−πþπ−πþ decays. The branching fraction for decay D0 → K−πþeþe− is measured to be ð39.6 ± 4.5 ðstatÞ ± 2.9 ðsystÞÞ × 10−7, with the dielectron mass in the ρ=ω mass region 675 < m<inf>ee</inf> < 875 MeV=c2. We also search for D0 → h−hð0Þþeþe− (hð0Þ ¼ K, π) decays with the dielectron mass near the η and ϕ resonances, and away from these resonances for the KþK−eþe− and πþπ−eþe− modes. For these modes, we find no significant signals and set 90% confidence level upper limits on their branching fractions at the Oð10−7Þ level.

DOI： 10.1103/mkx8-cl23

Scopus

Search for B0 →k∗0τ+τ- Decays at the Belle II Experiment Open Access

Adachi I., Adamczyk K., Aggarwal L., Ahmed H., Aihara H., Akopov N., Alhakami M., Aloisio A., Althubiti N., Angelsmark M., Anh Ky N., Asner D.M., Atmacan H., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Baghel N.K., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Bartl M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhardwaj V., Bhuyan B., Bianchi F., Bilka T., Biswas D., Bobrov A., Bodrov D., Bolz A., Bondar A., Boschetti A., Bozek A., Bračko M., Branchini P., Brenny N., Briere R.A., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Chang P., Cheaib R., Cheema P., Cheon B.G., Chilikin K., Chin J., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Cochran J., Consigny I., Corona L., Cui J.X., De La Cruz-Burelo E., De La Motte S.A., De Marino G., De Nardo G., De Pietro G., De Sangro R., Destefanis M., Dey S., Dhamija R., Di Canto A., Di Capua F., Dingfelder J., DoleŽal Z., Domínguez Jiménez I., Dong T.V., Dorigo M., Dossett D., Dubey S., Dugic K., Dujany G., Ecker P., Epifanov D.

Physical Review Letters 135 巻 ( 15 ) 2025年10月

出版者・発行元：Physical Review Letters

We present a search for the rare flavor-changing neutral-current decay B0→K∗0τ+τ- with data collected by the Belle II experiment at the SuperKEKB electron-positron collider. The analysis uses a 365 fb-1 data sample recorded at the center-of-mass energy of the ϒ(4S) resonance. One of the B mesons produced in the ϒ(4S)→B0B¯0 process is fully reconstructed in a hadronic decay mode, while its companion B meson is required to decay into a K∗0 and two τ leptons of opposite charge. The τ leptons are reconstructed in final states with a single electron, muon, charged pion or charged ρ meson, and additional neutrinos. We set an upper limit on the branching fraction of B(B0→K∗0τ+τ-)<1.8×10-3 at the 90% confidence level, which is the most stringent constraint reported to date.

DOI： 10.1103/v1q3-9dy8

Open Access

Scopus

Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment Open Access

Adachi I., Aggarwal L., Ahmed H., Aihara H., Akopov N., Alghamdi S., Alhakami M., Aloisio A., Althubiti N., Amos K., Angelsmark M., Anh Ky N., Antonioli C., Asner D.M., Atmacan H., Aushev V., Aversano M., Ayad R., Babu V., Baghel N.K., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Bartl M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., 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., Bonvicini G., Borah J., Boschetti A., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Cheaib R., Cheema P., Chen Y.T., Cheon B.G., Chilikin K., Chin J., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Cochran J., Consigny I., Corona L., Cui J.X., De La Cruz-Burelo E., De La Motte S.A., De Marino G., De Nardo G., De Pietro G., De Sangro R., Destefanis M., Dey S., Di Canto A., Di Capua F., Dingfelder J., DoleŽal Z., Domínguez Jiménez I., Dong T.V., Dong X., Dorigo M., Dossett D., Dugic K., Dujany G., Ecker P., Eppelt J., Feichtinger P.

Physical Review Letters 135 巻 ( 13 ) 2025年9月

出版者・発行元：Physical Review Letters

Inelastic dark matter models that have two dark matter particles and a massive dark photon can reproduce the observed relic dark matter density without violating cosmological limits. The mass splitting between the two dark matter particles χ1 and χ2, with m(χ2)>m(χ1), is induced by a dark Higgs field and a corresponding dark Higgs boson h′. We present a search for dark matter in events with two vertices, at least one of which must be displaced from the interaction region, and missing energy. Using a 365 fb-1 data sample collected at Belle II, which operates at the SuperKEKB e+e- collider, we observe no evidence for a signal. We set upper limits on the product of the production cross section σ(e+e-→h′χ1χ2), and the product of branching fractions B(χ2→χ1e+e-)×B(h′→x+x-), where x+x- indicates μ+μ-,π+π-, or K+K-, as functions of h′ mass and lifetime at the level of 10-1 fb. We set model-dependent upper limits on the dark Higgs mixing angle at the level of 10-5 and on the dark photon kinetic mixing parameter at the level of 10-3. This is the first search for dark Higgs bosons in association with inelastic dark matter.

DOI： 10.1103/37w5-glpp

Open Access

Scopus

Study of χbJ (2P) →ω γ (1S) at Belle Open Access

Stottler Z.S., Pedlar T.K., Fulsom B.G., Adachi I., Adamczyk K., Aihara H., Al Said S., Asner D.M., Atmacan H., Aushev T., Ayad R., Babu V., Banerjee S., Bauer M., Behera P., Belous K., Bennett J., Bernlochner F., Bessner M., Bilka T., Biswas D., Bobrov A., Bodrov D., Bonvicini G., Borah J., Bozek A., Branchini P., Browder T.E., Budano A., Campajola M., Cao L., Červenkov D., Chang M.C., Cheon B.G., Chilikin K., Cho H.E., Cho K., Choi S.K., Choi Y., Choudhury S., Cinabro D., Das S., De Nardo G., De Pietro G., Dhamija R., Di Capua F., DoleŽal Z., Dong T.V., Dubey S., Ecker P., Epifanov D., Ferber T., Ferlewicz D., Gaur V., Garmash A., Giri A., Goldenzweig P., Graziani E., Gu T., Guan Y., Gudkova K., Hadjivasiliou C., Hara T., Hayasaka K., Hazra S., Hedges M.T., Herrmann D., Hou W.S., Hsu C.L., Inami K., Ipsita N., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jia S., Jin Y., Kaliyar A.B., Kawasaki T., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kodyš P., Korobov A., Korpar S., Kovalenko E., KriŽan P., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y.J., Lai Y.T., Lam T., Laurenza M.

Physical Review Letters 135 巻 ( 12 ) 2025年9月

出版者・発行元：Physical Review Letters

We report a study of the hadronic transitions χbJ(2P)→ωγ(1S), with ω→π+π-π0, using 28.2×106 γ(3S) mesons recorded by the Belle detector. We present the first evidence for the near-threshold transition χb0(2P)→ωγ(1S), the analog of the near-threshold charm sector decay χc1(3872)→ωJ/ψ, with a branching fraction of B(χb0(2P)→ωγ(1S))=(0.55±0.19±0.07)%. We also obtain branching fractions of B(χb1(2P)→ωγ(1S))=(2.39-0.19+0.20±0.24)% and B(χb2(2P)→ωγ(1S))=(0.47-0.12+0.13±0.06)%, confirming the measurement of the ω transitions of the J=1,2P-wave states. The ratio for the J=2 to J=1 transitions is also measured and found to differ by 3.3 standard deviations from the expected value in the QCD multipole expansion.

DOI： 10.1103/dpb3-l6zc

Open Access

Scopus

Observation of the decays B+→Σc(2455)++Ξ-c and B0→Σc(2455)0Ξ0c Open Access

Abumusabh M., Adachi I., Aggarwal L., Ahmed H., Ahn Y., Aihara H., Akopov N., Alghamdi S., Alhakami M., Aloisio A., Althubiti N., Amos K., Ky N.A., Asner D.M., Atmacan H., Aushev T., Aushev V., Ayad R., Babu V., Bae H., Baghel N.K., Bahinipati S., Bambade P., Banerjee S., Barrett M., Bartl M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhardwaj V., Bhuyan B., Bianchi F., Biswas D., Bobrov A., Bodrov D., Bondar A., Bonvicini G., Borah J., Boschetti A., Bozek A., Bračko M., Branchini P., Briere R.A., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Chang M.C., Cheema P., Chen L., Cheon B.G., Chilikin K., Chin J., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Corona L., Cui J.X., De La Cruz-Burelo E., De La Motte S.A., De Nardo G., De Pietro G., de Sangro R., Destefanis M., Dey S., Di Canto A., Dingfelder J., Doležal Z., Jiménez I.D., Dong T.V., Dong X., Dorigo M., Dugic K., Dujany G., Ecker P., Epifanov D., Eppelt J., Farkas R., Feichtinger P., Ferber T., Fillinger T., Finck C., Finocchiaro G., Forti F.

Physical Review D 112 巻 ( 5 ) 頁： L0511011 - L0511019 2025年9月

出版者・発行元：Physical Review D

We report the first observation of the two-body baryonic decays B+ → Σ<inf>c</inf>(2455)++¯Ξ<inf>c</inf>− and B0 → Σ<inf>c</inf>(2455)0¯Ξ0<inf>c</inf> with significances of 7.3σ and 6.2σ, respectively, including statistical and systematic uncertainties. The branching fractions are measured to be B(B+ → Σ<inf>c</inf>(2455)++¯Ξ−<inf>c</inf>) =(5.74 ± 1.11 ± 0.42+2.47<inf>−1.53</inf>)× 10−4 and B(B0 → Σ<inf>c</inf>(2455)0¯Ξ0<inf>c</inf>) = (4.83 ± 1.12 ± 0.37+0.72<inf>−0.60</inf>) × 10−4. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the absolute branching fractions of ¯Ξ−<inf>c</inf> or ¯Ξ0<inf>c</inf> decays. The data samples used for this analysis have integrated luminosities of 711 fb−1 and 365 fb−1, and were collected at the ϒ(4S) resonance by the Belle and Belle II detectors operating at the KEKB and SuperKEKB asymmetric-energy e+e− colliders, respectively.

DOI： 10.1103/2fhj-8vyx

Open Access

Scopus

Search for a pentaquark state decaying into pJ/ψ in Υ(1, 2S) inclusive decays at Belle 査読有り国際共著国際誌 Open Access

Dong X., Zou S.M., Zhang H.Y., Wang X.L., Adachi I., Ahn J.K., Aihara H., Al Said S., Asner D.M., Atmacan H., Ayad R., Bahinipati S., Banerjee S., Bessner M., Bhardwaj V., Biswas D., Bodrov D., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chang P., Cheon B.G., Cho H.E., Cho K., Choi S.K., Choi Y., Choudhury S., Das S., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., Doležal Z., Dong T.V., Ecker P., Epifanov D., Ferber T., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Giri A., Goldenzweig P., Graziani E., Gu T., Guan Y., Gudkova K., Hadjivasiliou C., Hayashii H., Hazra S., Hedges M.T., Hou W.S., Hsu C.L., Inami K., Ipsita N., Ishikawa A., Itoh R., Iwasaki M., Jacobs W.W., Jia S., Jin Y., Kalita D., Kawasaki T., Kim D.Y., Kim K.H., Kim Y.J., Kim Y.K., Kinoshita K., Kodyš P., Korobov A., Korpar S., Kovalenko E., Križan P., Krokovny P., Kuhr T., Kumar R., Kumita T., Kuzmin A., Kwon Y.J., Lai Y.T., Lam T., Lange J.S., Levit D., Li L.K., Li Y., Li Y.B., Gioi L.L., Libby J., Liventsev D., Ma Y., Masuda M., Matsuda T., Maurya S.K., Meier F.

Journal of High Energy Physics 2025 巻 ( 9 ) 2025年9月

記述言語：英語出版者・発行元：Journal of High Energy Physics

Using the data samples of 102 million Υ(1S) and 158 million Υ(2S) events collected by the Belle detector, we search for a pentaquark state in the pJ/ψ final state from Υ(1, 2S) inclusive decays. Here, the charge-conjugate is included. We observe clear pJ/ψ production in Υ(1, 2S) decays and measure the branching fractions to be and. We also measure the cross section of inclusive pJ/ψ production in e+e− annihilation to be σ(e+e− → pJ/ψ + anything) = [108 ± 11(stat.) ± 6(syst.)] fb at GeV using an 89.5 fb−1 continuum data sample. There is no significant P<inf>c</inf>(4312)+, P<inf>c</inf>(4440)+ or P<inf>c</inf>(4457)+ signal found in the pJ/ψ final states in Υ(1, 2S) inclusive decays. We determine the upper limits of to be at the 10−6 level.

DOI： 10.1007/JHEP09(2025)048

Open Access

Scopus

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