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Study of the Semileptonic Decay Λ_{c}
Ablikim, M; Achasov, M N; Adlarson, P; Albrecht, M; Aliberti, R; Amoroso, A; An, M R; An, Q; Bai, X H; Bai, Y; Bakina, O; Baldini Ferroli, R; Balossino, I; Ban, Y; Batozskaya, V; Becker, D; Begzsuren, K; Berger, N; Bertani, M; Bettoni, D; Bianchi, F; Bloms, J; Bortone, A; Boyko, I; Briere, R A; Brueggemann, A; Cai, H; Cai, X; Calcaterra, A; Cao, G F; Cao, N; Cetin, S A; Chang, J F; Chang, W L; Chelkov, G; Chen, C; Chen, Chao; Chen, G; Chen, H S; Chen, M L; Chen, S J; Chen, S M; Chen, T; Chen, X R; Chen, X T; Chen, Y B; Chen, Z J; Cheng, W S; Choi, S K; Chu, X.
Afiliación
  • Ablikim M; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
  • Achasov MN; G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia.
  • Adlarson P; Uppsala University, Box 516, SE-75120 Uppsala, Sweden.
  • Albrecht M; Bochum Ruhr-University, D-44780 Bochum, Germany.
  • Aliberti R; Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
  • Amoroso A; University of Turin and INFN:University of Turin, I-10125 Turin, Italy.
  • An MR; INFN, I-10125 Turin, Italy.
  • An Q; Liaoning Normal University, Dalian 116029, People's Republic of China.
  • Bai XH; State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
  • Bai Y; University of Science and Technology of China, Hefei 230026, People's Republic of China.
  • Bakina O; University of Jinan, Jinan 250022, People's Republic of China.
  • Baldini Ferroli R; Southeast University, Nanjing 211100, People's Republic of China.
  • Balossino I; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Ban Y; INFN Laboratori Nazionali di Frascati: INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy.
  • Batozskaya V; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
  • Becker D; INFN Sezione di Ferrara: INFN Sezione di Ferrara, I-44122 Ferrara, Italy.
  • Begzsuren K; Peking University, Beijing 100871, People's Republic of China.
  • Berger N; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
  • Bertani M; National Centre for Nuclear Research, Warsaw 02-093, Poland.
  • Bettoni D; Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
  • Bianchi F; Institute of Physics and Technology, Peace Avenue 54B, Ulaanbaatar 13330, Mongolia.
  • Bloms J; Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
  • Bortone A; INFN Laboratori Nazionali di Frascati: INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy.
  • Boyko I; INFN Sezione di Ferrara: INFN Sezione di Ferrara, I-44122 Ferrara, Italy.
  • Briere RA; University of Turin and INFN:University of Turin, I-10125 Turin, Italy.
  • Brueggemann A; INFN, I-10125 Turin, Italy.
  • Cai H; University of Muenster, Wilhelm-Klemm-Straße 9, 48149 Muenster, Germany.
  • Cai X; University of Turin and INFN:University of Turin, I-10125 Turin, Italy.
  • Calcaterra A; INFN, I-10125 Turin, Italy.
  • Cao GF; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Cao N; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
  • Cetin SA; University of Muenster, Wilhelm-Klemm-Straße 9, 48149 Muenster, Germany.
  • Chang JF; Wuhan University, Wuhan 430072, People's Republic of China.
  • Chang WL; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
  • Chelkov G; State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
  • Chen C; INFN Laboratori Nazionali di Frascati: INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy.
  • Chen C; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
  • Chen G; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
  • Chen HS; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
  • Chen ML; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
  • Chen SJ; Turkish Accelerator Center Particle Factory Group: Istinye University, 34010 Istanbul, Turkey.
  • Chen SM; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
  • Chen T; State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
  • Chen XR; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
  • Chen XT; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
  • Chen YB; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Chen ZJ; Nankai University, Tianjin 300071, People's Republic of China.
  • Cheng WS; Soochow University, Suzhou 215006, People's Republic of China.
  • Choi SK; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
  • Chu X; Institute of High Energy Physics, Beijing 100049, People's Republic of China.
Phys Rev Lett ; 129(23): 231803, 2022 Dec 02.
Article en En | MEDLINE | ID: mdl-36563214
The study of the Cabibbo-favored semileptonic decay Λ_{c}^{+}→Λe^{+}ν_{e} is reported using a 4.5 fb^{-1} data sample of e^{+}e^{-} annihilations collected at center-of-mass energies ranging from 4.600 GeV to 4.699 GeV with the BESIII detector at the BEPCII collider. The branching fraction of the decay is measured to be B(Λ_{c}^{+}→Λe^{+}ν_{e})=(3.56±0.11_{stat}±0.07_{syst})%, which is the most precise measurement to date. Furthermore, we perform an investigation of the internal dynamics in Λ_{c}^{+}→Λe^{+}ν_{e}. We provide the first direct comparisons of the differential decay rate and form factors with those predicted from lattice quantum chromodynamics (LQCD) calculations. Combining the measured branching fraction with a q^{2}-integrated rate predicted by LQCD, we determine |V_{cs}|=0.936±0.017_{B}±0.024_{LQCD}±0.007_{τ_{Λ_{c}}}.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Phys Rev Lett Año: 2022 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Phys Rev Lett Año: 2022 Tipo del documento: Article Pais de publicación: Estados Unidos