Observation of the Radiative Decays of Ï(1S) to &#967;_{c1}.

Katrenko, P; Adachi, I; Aihara, H; Al Said, S; Asner, D M; Aushev, T; Badhrees, I; Bahinipati, S; Behera, P; Beleño, 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; Garmash, A; Giri, A; Goldenzweig, P; Golob, B; Grzymkowska, O; Hartbrich, O; Hayasaka, K; Hayashii, H

Observation of the Radiative Decays of Ï(1S) to χ_{c1}.

Katrenko, P; Adachi, I; Aihara, H; Al Said, S; Asner, D M; Aushev, T; Badhrees, I; Bahinipati, S; Behera, P; Beleño, 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; Garmash, A; Giri, A; Goldenzweig, P; Golob, B; Grzymkowska, O; Hartbrich, O; Hayasaka, K; Hayashii, H.

Afiliación

Katrenko P; P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991.
Adachi I; Moscow Institute of Physics and Technology, Moscow Region 141700.
Aihara H; SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193.
Al Said S; High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
Asner DM; Department of Physics, University of Tokyo, Tokyo 113-0033.
Aushev T; Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589.
Badhrees I; Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451.
Bahinipati S; Brookhaven National Laboratory, Upton, New York 11973.
Behera P; Moscow Institute of Physics and Technology, Moscow Region 141700.
Beleño C; King Abdulaziz City for Science and Technology, Riyadh 11442.
Bennett J; Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451.
Bhardwaj V; Indian Institute of Technology Bhubaneswar, Satya Nagar 751007.
Bhuyan B; Indian Institute of Technology Madras, Chennai 600036.
Biswal J; II. Physikalisches Institut, Georg-August-Universität Göttingen, 37073 Göttingen.
Bobrov A; University of Mississippi, University, Mississippi 38677.
Bonvicini G; Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306.
Bracko M; Indian Institute of Technology Guwahati, Assam 781039.
Campajola M; J. Stefan Institute, 1000 Ljubljana.
Cao L; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090.
Cervenkov D; Novosibirsk State University, Novosibirsk 630090.
Chekelian V; Wayne State University, Detroit, Michigan 48202.
Chen A; J. Stefan Institute, 1000 Ljubljana.
Cheon BG; University of Maribor, 2000 Maribor.
Chilikin K; INFN-Sezione di Napoli, 80126 Napoli.
Cho HE; Università di Napoli Federico II, 80055 Napoli.
Cho K; Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
Choi SK; Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
Choi Y; Max-Planck-Institut für Physik, 80805 München.
Choudhury S; National Central University, Chung-li 32054.
Cinabro D; Department of Physics and Institute of Natural Sciences, Hanyang University, Seoul 04763.
Cunliffe S; P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991.
Di Capua F; Department of Physics and Institute of Natural Sciences, Hanyang University, Seoul 04763.
Di Carlo S; Korea Institute of Science and Technology Information, Daejeon 34141.
Dolezal Z; Gyeongsang National University, Jinju 52828.
Dong TV; Sungkyunkwan University, Suwon 16419.
Eidelman S; Indian Institute of Technology Hyderabad, Telangana 502285.
Epifanov D; Wayne State University, Detroit, Michigan 48202.
Fast JE; Deutsches Elektronen-Synchrotron, 22607 Hamburg.
Fulsom BG; INFN-Sezione di Napoli, 80126 Napoli.
Garg R; Università di Napoli Federico II, 80055 Napoli.
Gaur V; LAL, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay 91898.
Gabyshev N; Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
Garmash A; Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai 200443.
Giri A; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090.
Goldenzweig P; P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991.
Golob B; Novosibirsk State University, Novosibirsk 630090.
Grzymkowska O; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090.
Hartbrich O; Novosibirsk State University, Novosibirsk 630090.
Hayasaka K; Pacific Northwest National Laboratory, Richland, Washington 99352.
Hayashii H; Pacific Northwest National Laboratory, Richland, Washington 99352.

Phys Rev Lett ; 124(12): 122001, 2020 Mar 27.

Article en En | MEDLINE | ID: mdl-32281835

ABSTRACT

ABSTRACT

We report the first observation of the radiative decay of the Ï(1S) into a charmonium state. The significance of the observed signal of Ï(1S)âÎ³χ_{c1} is 6.3 standard deviations including systematics. The branching fraction is calculated to be B[Ï(1S)âÎ³χ_{c1}]=[4.7_{-1.8}^{+2.4}(stat)_{-0.5}^{+0.4}(sys)×10^{-5}]. We also searched for Ï(1S) radiative decays into χ_{c0,2} and Î·_{c}(1S,2S), and set upper limits on their branching fractions. These results are obtained from a 24.9 fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider at a center-of-mass energy equal to the Ï(2S) mass using Ï(1S) tagging by the Ï(2S)âÏ(1S)π^{+}π^{-} transitions.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2020 Tipo del documento: Article