Measurements of isospin asymmetry and difference of direct CP asymmetries in inclusive BXsγ decays

Watanuki, S. (Department of Physics, Tohoku University, Sendai 980-8578) ; Ishikawa, A. (Department of Physics, Tohoku University, Sendai 980-8578) ; Adachi, I. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Aihara, H. (Department of Physics, University of Tokyo, Tokyo 113-0033) ; Al Said, S. (Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451) (Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589) ; Asner, D. M. (Brookhaven National Laboratory, Upton, New York 11973) ; Aushev, T. (Moscow Institute of Physics and Technology, Moscow Region 141700) ; Ayad, R. (Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451) ; Babu, V. (Tata Institute of Fundamental Research, Mumbai 400005) ; Badhrees, I. (Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451) (King Abdulaziz City for Science and Technology, Riyadh 11442) ; Bakich, A. M. (School of Physics, University of SydneySydney, New South Wales 2006) ; Bansal, V. (Pacific Northwest National Laboratory, Richland, Washington 99352) ; Behera, P. (Indian Institute of Technology, Madras, Chennai 600036) ; Beleño, C. (II. Physikalisches Institut, Georg-August-Universität Göttingen, 37073 Göttingen) ; Berger, M. (Stefan Meyer Institute for Subatomic Physics, Vienna 1090) ; Bhardwaj, V. (Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306 Mohali) ; Bhuyan, B. (Indian Institute of Technology, Guwahati, Assam 781039) ; Bilka, T. (Faculty of Mathematics and Physics, Charles University, 121 16 Prague) ; Biswal, J. (J. Stefan Institute, 1000 Ljubljana) ; Bobrov, A. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Bonvicini, G. (Wayne State University, Detroit, Michigan 48202) ; Bozek, A. (H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342) ; Bračko, M. (University of Maribor, 2000 Maribor) (J. Stefan Institute, 1000 Ljubljana) ; Browder, T. E. (University of Hawaii, Honolulu, Hawaii 96822) ; Cao, L. (Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe) ; Červenkov, D. (Faculty of Mathematics and Physics, Charles University, 121 16 Prague) ; Chang, P. (Department of Physics, National Taiwan University, Taipei 10617) ; Cheon, B. G. (Hanyang University, Seoul 133-791) ; Chilikin, K. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) ; Cho, K. (Korea Institute of Science and Technology Information, Daejeon 305-806) ; Choi, Y. (Sungkyunkwan University, Suwon 440-746) ; Choudhury, S. (Indian Institute of Technology, Hyderabad, Telangana 502285) ; Cinabro, D. (Wayne State University, Detroit, Michigan 48202) ; Cunliffe, S. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Di Carlo, S. (LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay) ; Dingfelder, J. (University of Bonn, 53115 Bonn) ; Dong, T. V. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Eidelman, S. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) ; Epifanov, D. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Fast, J. E. (Pacific Northwest National Laboratory, Richland, Washington 99352) ; Ferber, T. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Frey, A. (II. Physikalisches Institut, Georg-August-Universität Göttingen, 37073 Göttingen) ; Fulsom, B. G. (Pacific Northwest National Laboratory, Richland, Washington 99352) ; Gaur, V. (Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061) ; Gabyshev, N. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Garmash, A. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Gelb, M. (Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe) ; Giri, A. (Indian Institute of Technology, Hyderabad, Telangana 502285) ; Goldenzweig, P. (Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe) ; Guan, Y. (Indiana University, Bloomington, Indiana 47408) (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) ; Guido, E. (INFN—Sezione di Torino, 10125 Torino) ; Haba, J. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Hayasaka, K. (Niigata University, Niigata 950-2181) ; Hayashii, H. (Nara Women’s University, Nara 630-8506) ; Hou, W.S. (Department of Physics, National Taiwan University, Taipei 10617) ; Iijima, T. (Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602) (Graduate School of Science, Nagoya University, Nagoya 464-8602) ; Inami, K. (Graduate School of Science, Nagoya University, Nagoya 464-8602) ; Inguglia, G. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Itoh, R. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Iwasaki, M. (Osaka City University, Osaka 558-8585) ; Iwasaki, Y. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) ; Jacobs, W. W. (Indiana University, Bloomington, Indiana 47408) ; Jaegle, I. (University of Florida, Gainesville, Florida 32611) ; Jeon, H. B. (Kyungpook National University, Daegu 702-701) ; Jia, S. (Beihang University, Beijing 100191) ; Jin, Y. (Department of Physics, University of Tokyo, Tokyo 113-0033) ; Joo, K. K. (Chonnam National University, Kwangju 660-701) ; Julius, T. (School of Physics, University of Melbourne, Melbourne, Victoria 3010) ; Karyan, G. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Kawasaki, T. (Kitasato University, Tokyo 108-0072) ; Kiesling, C. (Max-Planck-Institut für Physik, 80805 München) ; Kim, D. Y. (Soongsil University, Seoul 156-743) ; Kim, J. B. (Korea University, Seoul 136-713) ; Kim, S. H. (Hanyang University, Seoul 133-791) ; Kinoshita, K. (University of Cincinnati, Cincinnati, Ohio 45221) ; Kodyš, P. (Faculty of Mathematics and Physics, Charles University, 121 16 Prague) ; Korpar, S. (University of Maribor, 2000 Maribor) (J. Stefan Institute, 1000 Ljubljana) ; Kotchetkov, D. (University of Hawaii, Honolulu, Hawaii 96822) ; Križan, P. (Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana) (J. Stefan Institute, 1000 Ljubljana) ; Kroeger, R. (University of Mississippi, University, Mississippi 38677) ; Krokovny, P. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Kuhr, T. (Ludwig Maximilians University, 80539 Munich) ; Kumar, R. (Punjab Agricultural University, Ludhiana 141004) ; Kuzmin, A. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Kwon, Y.J. (Yonsei University, Seoul 120-749) ; Lee, I. S. (Hanyang University, Seoul 133-791) ; Lee, S. C. (Kyungpook National University, Daegu 702-701) ; Li, L. K. (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049) ; Li, Y. B. (Peking University, Beijing 100871) ; Li Gioi, L. (Max-Planck-Institut für Physik, 80805 München) ; Libby, J. (Indian Institute of Technology, Madras, Chennai 600036) ; Liventsev, D. (Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061) (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) ; Lubej, M. (J. Stefan Institute, 1000 Ljubljana) ; Luo, T. (Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai 200443) ; Masuda, M. (Earthquake Research Institute, University of Tokyo, Tokyo 113-0032) ; Matsuda, T. (University of Miyazaki, Miyazaki 889-2192) ; Merola, M. (INFN—Sezione di Napoli, 80126 Napoli) (Università di Napoli Federico II, 80055 Napoli) ; Miyabayashi, K. (Nara Women’s University, Nara 630-8506) ; Miyata, H. (Niigata University, Niigata 950-2181) ; Mizuk, R. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) (Moscow Physical Engineering Institute, Moscow 115409) (Moscow Institute of Physics and Technology, Moscow Region 141700) ; Mohanty, G. B. (Tata Institute of Fundamental Research, Mumbai 400005) ; Mori, T. (Graduate School of Science, Nagoya University, Nagoya 464-8602) ; Nakao, M. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Nanut, T. (J. Stefan Institute, 1000 Ljubljana) ; Nath, K. J. (Indian Institute of Technology, Guwahati, Assam 781039) ; Niiyama, M. (Kyoto University, Kyoto 606-8502) ; Nishida, S. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Nishimura, K. (University of Hawaii, Honolulu, Hawaii 96822) ; Ogawa, K. (Niigata University, Niigata 950-2181) ; Ogawa, S. (Toho University, Funabashi 274-8510) ; Okuno, S. (Kanagawa University, Yokohama 221-8686) ; Ono, H. (Nippon Dental University, Niigata 951-8580) (Niigata University, Niigata 950-2181) ; Ostrowicz, W. (H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342) ; Pakhlov, P. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) (Moscow Physical Engineering Institute, Moscow 115409) ; Pakhlova, G. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) (Moscow Institute of Physics and Technology, Moscow Region 141700) ; Pal, B. (Brookhaven National Laboratory, Upton, New York 11973) ; Park, H. (Kyungpook National University, Daegu 702-701) ; Paul, S. (Department of Physics, Technische Universität München, 85748 Garching) ; Pedlar, T. K. (Luther College, Decorah, Iowa 52101) ; Pestotnik, R. (J. Stefan Institute, 1000 Ljubljana) ; Piilonen, L. E. (Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061) ; Prencipe, E. (Forschungszentrum Jülich, 52425 Jülich) ; Ritter, M. (Ludwig Maximilians University, 80539 Munich) ; Rostomyan, A. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Russo, G. (INFN—Sezione di Napoli, 80126 Napoli) ; Sakai, Y. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Sandilya, S. (University of Cincinnati, Cincinnati, Ohio 45221) ; Santelj, L. (J. Stefan Institute, 1000 Ljubljana) ; Savinov, V. (University of Pittsburgh, Pittsburgh, Pennsylvania 15260) ; Schneider, O. (École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015) ; Schnell, G. (University of the Basque Country UPV/EHU, 48080 Bilbao) (IKERBASQUE, Basque Foundation for Science, 48013 Bilbao) ; Schueler, J. (University of Hawaii, Honolulu, Hawaii 96822) ; Schwanda, C. (Institute of High Energy Physics, Vienna 1050) ; Schwartz, A. J. (University of Cincinnati, Cincinnati, Ohio 45221) ; Seino, Y. (Niigata University, Niigata 950-2181) ; Senyo, K. (Yamagata University, Yamagata 990-8560) ; Seon, O. (Graduate School of Science, Nagoya University, Nagoya 464-8602) ; Shebalin, V. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Shibata, T.A. (Tokyo Institute of Technology, Tokyo 152-8550) ; Shiu, J.G. (Department of Physics, National Taiwan University, Taipei 10617) ; Shwartz, B. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Sokolov, A. (Institute for High Energy Physics, Protvino 142281) ; Solovieva, E. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) (Moscow Institute of Physics and Technology, Moscow Region 141700) ; Stanič, S. (University of Nova Gorica, 5000 Nova Gorica) ; Starič, M. (J. Stefan Institute, 1000 Ljubljana) ; Sumiyoshi, T. (Tokyo Metropolitan University, Tokyo 192-0397) ; Sutcliffe, W. (Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe) ; Takizawa, M. (Showa Pharmaceutical University, Tokyo 194-8543) (J-PARC Branch, KEK Theory Center, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (Theoretical Research Division, Nishina Center, RIKEN, Saitama 351-0198) ; Tanida, K. (Advanced Science Research Center, Japan Atomic Energy Agency, Naka 319-1195) ; Taniguchi, N. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) ; Tenchini, F. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Uchida, M. (Tokyo Institute of Technology, Tokyo 152-8550) ; Uglov, T. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) (Moscow Institute of Physics and Technology, Moscow Region 141700) ; Unno, Y. (Hanyang University, Seoul 133-791) ; Uno, S. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Vahsen, S. E. (University of Hawaii, Honolulu, Hawaii 96822) ; Van Hulse, C. (University of the Basque Country UPV/EHU, 48080 Bilbao) ; Van Tonder, R. (Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe) ; Varner, G. (University of Hawaii, Honolulu, Hawaii 96822) ; Varvell, K. E. (School of Physics, University of SydneySydney, New South Wales 2006) ; Vossen, A. (Duke University, Durham, North Carolina 27708) ; Wang, B. (University of Cincinnati, Cincinnati, Ohio 45221) ; Wang, C. H. (National United University, Miao Li 36003) ; Wang, M.Z. (Department of Physics, National Taiwan University, Taipei 10617) ; Wang, P. (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049) ; Watanabe, M. (Niigata University, Niigata 950-2181) ; Widmann, E. (Stefan Meyer Institute for Subatomic Physics, Vienna 1090) ; Won, E. (Korea University, Seoul 136-713) ; Ye, H. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Yin, J. H. (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049) ; Yusa, Y. (Niigata University, Niigata 950-2181) ; Zakharov, S. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) (Moscow Institute of Physics and Technology, Moscow Region 141700) ; Zhang, Z. P. (University of Science and Technology of China, Hefei 230026) ; Zhilich, V. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Zhukova, V. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) (Moscow Physical Engineering Institute, Moscow 115409) ; Zhulanov, V. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Zupanc, A. (Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana) (J. Stefan Institute, 1000 Ljubljana)

20 February 2019

Abstract: We report measurements of isospin asymmetry Δ0 and difference of direct CP asymmetries ΔACP between charged and neutral BXsγ decays. This analysis is based on the data sample containing 772×106BB¯ pairs that was collected with the Belle detector at the KEKB energy-asymmetric e+e collider. Using a sum-of-exclusive technique with invariant Xs mass up to 2.8 GeV/c2, we obtain Δ0=[0.48±1.49(stat)±0.97(syst)±1.15(f+/f00)]% and ΔACP=[+3.69±2.65(stat)±0.76(syst)]%, where the last uncertainty for Δ0 is due to the uncertainty on the production ratio of B+B to B0B¯0 in ϒ(4S) decays. The measured value of Δ0 is consistent with zero, allowing us to constrain the resolved photon contribution in the BXsγ, and improve the branching fraction prediction. The result for ΔACP is consistent with the prediction of the SM. We also measure the direct CP asymmetries for charged and neutral BXsγ decays. All the measurements are the most precise to date.


Published in: Physical Review D 99 (2019)
Published by: APS
DOI: 10.1103/PhysRevD.99.032012
arXiv: 1807.04236
License: CC-BY-4.0



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