Evidence for B+hcK+ and observation of ηc(2S)pp¯π+π

Chilikin, K. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) ; Adachi, I. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Asner, D. M. (Brookhaven National Laboratory, Upton, New York 11973) ; Aulchenko, V. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; 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, Saudi Arabia) ; 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) ; Bilka, T. (Faculty of Mathematics and Physics, Charles University, 121 16 Prague) ; Biswal, J. (J. Stefan Institute, 1000 Ljubljana, Slovenia) ; Bobrov, A. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Bondar, A. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Bozek, A. (H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342) ; Bračko, M. (University of Maribor, 2000 Maribor) (J. Stefan Institute, 1000 Ljubljana, Slovenia) ; Browder, T. E. (University of Hawaii, Honolulu, Hawaii 96822) ; Campajola, M. (INFN—Sezione di Napoli, 80126 Napoli) (Università di Napoli Federico II, 80055 Napoli) ; Cao, L. (Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe) ; Červenkov, D. (Faculty of Mathematics and Physics, Charles University, 121 16 Prague) ; Chekelian, V. (Max-Planck-Institut für Physik, 80805 München) ; Chen, A. (National Central University, Chung-li 32054) ; Cheon, B. G. (Hanyang University, Seoul 133-791) ; Cho, K. (Korea Institute of Science and Technology Information, Daejeon 305-806) ; Choi, S.K. (Gyeongsang National University, Chinju 660-701) ; Choi, Y. (Sungkyunkwan University, Suwon 440-746) ; 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) ; Doležal, Z. (Faculty of Mathematics and Physics, Charles University, 121 16 Prague) ; 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) ; Fulsom, B. G. (Pacific Northwest National Laboratory, Richland, Washington 99352) ; Garg, R. (Panjab University, Chandigarh 160014) ; 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) ; Grzymkowska, O. (H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342) ; Haba, J. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Hara, T. (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) ; Hsu, C.L. (School of Physics, University of Sydney, New South Wales 2006) ; Inami, K. (Graduate School of Science, Nagoya University, Nagoya 464-8602) ; Ishikawa, A. (Department of Physics, Tohoku University, Sendai 980-8578) ; 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) ; Jia, S. (Beihang University, Beijing 100191) ; Jin, Y. (Department of Physics, University of Tokyo, Tokyo 113-0033) ; Joffe, D. (Kennesaw State University, Kennesaw, Georgia 30144) ; Joo, K. K. (Chonnam National University, Kwangju 660-701) ; Julius, T. (School of Physics, University of Melbourne, Victoria 3010) ; Kaliyar, A. B. (Indian Institute of Technology Madras, Chennai 600036) ; Karyan, G. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Kato, Y. (Graduate School of Science, Nagoya University, Nagoya 464-8602) ; Kiesling, C. (Max-Planck-Institut für Physik, 80805 München) ; Kim, C. H. (Hanyang University, Seoul 133-791) ; Kim, D. Y. (Soongsil University, Seoul 156-743) ; 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, Slovenia) ; Kotchetkov, D. (University of Hawaii, Honolulu, Hawaii 96822) ; Kroeger, R. (University of Mississippi, University, Mississippi 38677) ; Krokovny, P. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Kulasiri, R. (Kennesaw State University, Kennesaw, Georgia 30144) ; Kumar, R. (Punjab Agricultural University, Ludhiana 141004) ; Kwon, Y.J. (Yonsei University, Seoul 120-749) ; Lalwani, K. (Malaviya National Institute of Technology Jaipur, Jaipur 302017) ; Lange, J. S. (Justus-Liebig-Universität Gießen, 35392 Gießen) ; Lee, J. K. (Seoul National University, Seoul 151-742) ; Lee, J. Y. (Seoul National University, Seoul 151-742) ; 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) ; Lu, P.C. (Department of Physics, National Taiwan University, Taipei 10617) ; Luo, T. (Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai 200443) ; MacNaughton, J. (University of Miyazaki, Miyazaki 889-2192) ; MacQueen, C. (School of Physics, University of Melbourne, Victoria 3010) ; Masuda, M. (Earthquake Research Institute, University of Tokyo, Tokyo 113-0032) ; Matsuda, T. (University of Miyazaki, Miyazaki 889-2192) ; Matvienko, D. (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) ; Merola, M. (INFN—Sezione di Napoli, 80126 Napoli) (Università di Napoli Federico II, 80055 Napoli) ; Miyabayashi, K. (Nara Women’s University, Nara 630-8506) ; 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) ; Nath, K. J. (Indian Institute of Technology Guwahati, Assam 781039) ; Nayak, M. (Wayne State University, Detroit, Michigan 48202) (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) ; Niiyama, M. (Kyoto University, Kyoto 606-8502) ; Nisar, N. K. (University of Pittsburgh, Pittsburgh, Pennsylvania 15260) ; 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) ; Ono, H. (Nippon Dental University, Niigata 951-8580) (Niigata University, Niigata 950-2181) ; Onuki, Y. (Department of Physics, University of Tokyo, Tokyo 113-0033) ; 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) ; Pardi, S. (INFN—Sezione di Napoli, 80126 Napoli) ; Park, H. (Kyungpook National University, Daegu 702-701) ; Patra, S. (Indian Institute of Science Education and Research Mohali, SAS Nagar 140306) ; 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, Slovenia) ; Piilonen, L. E. (Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061) ; Popov, V. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) (Moscow Institute of Physics and Technology, Moscow Region 141700) ; 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) ; Salehi, M. (University of Malaya, 50603 Kuala Lumpur) (Ludwig Maximilians University, 80539 Munich) ; Sandilya, S. (University of Cincinnati, Cincinnati, Ohio 45221) ; Sanuki, T. (Department of Physics, Tohoku University, Sendai 980-8578) ; 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) ; Schwanda, C. (Institute of High Energy Physics, Vienna 1050) ; Seino, Y. (Niigata University, Niigata 950-2181) ; Senyo, K. (Yamagata University, Yamagata 990-8560) ; Sevior, M. E. (School of Physics, University of Melbourne, Victoria 3010) ; Shen, C. P. (Beihang University, Beijing 100191) ; 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) ; Simon, F. (Max-Planck-Institut für Physik, 80805 München) ; Sokolov, A. (Institute for High Energy Physics, Protvino 142281) ; Solovieva, E. (P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991) ; Starič, M. (J. Stefan Institute, 1000 Ljubljana, Slovenia) ; Stottler, Z. S. (Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061) ; Strube, J. F. (Pacific Northwest National Laboratory, Richland, Washington 99352) ; 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) ; Tamponi, U. (INFN—Sezione di Torino, 10125 Torino) ; Tanida, K. (Advanced Science Research Center, Japan Atomic Energy Agency, Naka 319-1195) ; Tenchini, F. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Trabelsi, K. (LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay) ; Uchida, M. (Tokyo Institute of Technology, Tokyo 152-8550) ; Uno, S. (High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801) (SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193) ; Urquijo, P. (School of Physics, University of Melbourne, Victoria 3010) ; Usov, Y. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Van Tonder, R. (Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe) ; Varner, G. (University of Hawaii, Honolulu, Hawaii 96822) ; Vinokurova, A. (Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090) (Novosibirsk State University, Novosibirsk 630090) ; Wang, B. (Max-Planck-Institut für Physik, 80805 München) ; 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) ; Watanuki, S. (Department of Physics, Tohoku University, Sendai 980-8578) ; Won, E. (Korea University, Seoul 136-713) ; Yang, S. B. (Korea University, Seoul 136-713) ; Ye, H. (Deutsches Elektronen–Synchrotron, 22607 Hamburg) ; Yelton, J. (University of Florida, Gainesville, Florida 32611) ; Yin, J. H. (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049) ; Yuan, C. Z. (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049) ; Zhang, J. (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049) ; 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)

10 July 2019

Abstract: A search for the decays B+hcK+ and B0hcKS0 is performed. Evidence for the decay B+hcK+ is found; its significance is 4.8σ. No evidence is found for B0hcKS0. The branching fraction for B+hcK+ is measured to be (3.70.9+1.0 0.8+0.8)×105; the upper limit for the B0hcKS0 branching fraction is 1.4×105 at 90% C.L. In addition, a study of the pp¯π+π invariant mass distribution in the channel B+(pp¯π+π)K+ results in the first observation of the decay ηc(2S)pp¯π+π with 12.1σ significance. The analysis is based on the 711 fb1 data sample collected by the Belle detector at the asymmetric-energy e+e collider KEKB at the ϒ(4S) resonance.


Published in: Physical Review D 100 (2019)
Published by: APS
DOI: 10.1103/PhysRevD.100.012001
License: CC-BY-4.0



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