Measurement of the absolute branching fraction for Λc+→Λμ+νμ

6533b7cffe1ef96bd1257d19

RESEARCH PRODUCT

Measurement of the absolute branching fraction for Λc+→Λμ+νμ

M. Ablikim M.n. Achasov S. Ahmed X.c. Ai O. Albayrak M. Albrecht D.j. Ambrose A. Amoroso F.f. An Q. An J.z. Bai O. Bakina R. Baldini Ferroli Y. Ban D.w. Bennett J.v. Bennett N. Berger M. Bertani D. Bettoni J.m. Bian F. Bianchi E. Boger I. Boyko R.a. Briere H. Cai X. Cai O. Cakir A. Calcaterra G.f. Cao S.a. Cetin J.f. Chang G. Chelkov G. Chen H.s. Chen J.c. Chen M.l. Chen S. Chen S.j. Chen X. Chen X.r. Chen Y.b. Chen X.k. Chu G. Cibinetto H.l. Dai J.p. Dai A. Dbeyssi D. Dedovich Z.y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori Y. Ding C. Dong J. Dong L.y. Dong M.y. Dong Z.l. Dou S.x. Du P.f. Duan J.z. Fan J. Fang S.s. Fang X. Fang Y. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C.q. Feng E. Fioravanti M. Fritsch C.d. Fu Q. Gao X.l. Gao Y. Gao Z. Gao I. Garzia K. Goetzen L. Gong W.x. Gong W. Gradl M. Greco M.h. Gu Y.t. Gu Y.h. Guan A.q. Guo L.b. Guo R.p. Guo Y. Guo Y.p. Guo Z. Haddadi A. Hafner S. Han X.q. Hao F.a. Harris K.l. He F.h. Heinsius T. Held Y.k. Heng T. Holtmann Z.l. Hou C. Hu H.m. Hu J.f. Hu T. Hu Y. Hu G.s. Huang J.s. Huang X.t. Huang X.z. Huang Z.l. Huang T. Hussain W. Ikegami Andersson Q. Ji Q.p. Ji X.b. Ji X.l. Ji L.w. Jiang X.s. Jiang X.y. Jiang J.b. Jiao Z. Jiao D.p. Jin S. Jin T. Johansson A. Julin N. Kalantar-nayestanaki X.l. Kang X.s. Kang M. Kavatsyuk B.c. Ke P. Kiese R. Kliemt B. Kloss O.b. Kolcu B. Kopf M. Kornicer A. Kupsc W. Kühn J.s. Lange M. Lara P. Larin L. Lavezzi H. Leithoff C. Leng C. Li Li Cheng D.m. Li F. Li F.y. Li G. Li H.b. Li H.j. Li J.c. Li Jin Li K. Li K. Li Lei. Li P.r. Li Q.y. Li T. Li W.d. Li W.g. Li X.l. Li X.n. Li X.q. Li Y.b. Li Z.b. Li H. Liang Y.f. Liang Y.t. Liang G.r. Liao D.x. Lin B. Liu B.j. Liu C.x. Liu D. Liu F.h. Liu Fang Liu Feng Liu H.b. Liu H.h. Liu H.h. Liu H.m. Liu J. Liu J.b. Liu J.p. Liu J.y. Liu K. Liu K.y. Liu L.d. Liu P.l. Liu Q. Liu Q.j. Liu S.b. Liu X. Liu Y.b. Liu Y.y. Liu Z.a. Liu Z.q. Liu H. Loehner X.c. Lou H.j. Lu J.g. Lu Y. Lu Y.p. Lu C.l. Luo M.x. Luo T. Luo X.l. Luo X.r. Lyu F.c. Ma H.l. Ma L.l. Ma M.m. Ma Q.m. Ma T. Ma X.n. Ma X.y. Ma Y.m. Ma F.e. Maas M. Maggiora Q.a. Malik Y.j. Mao Z.p. Mao S. Marcello J.g. Messchendorp G. Mezzadri J. Min T.j. Min R.e. Mitchell X.h. Mo Y.j. Mo C. Morales Morales N.yu. Muchnoi H. Muramatsu P. Musiol Y. Nefedov F. Nerling I.b. Nikolaev Z. Ning S. Nisar S.l. Niu X.y. Niu S.l. Olsen Q. Ouyang S. Pacetti Y. Pan P. Patteri M. Pelizaeus H.p. Peng K. Peters J. Pettersson J.l. Ping R.g. Ping R. Poling V. Prasad H.r. Qi M. Qi S. Qian C.f. Qiao L.q. Qin N. Qin X.s. Qin Z.h. Qin J.f. Qiu K.h. Rashid C.f. Redmer M. Ripka G. Rong Ch. Rosner X.d. Ruan A. Sarantsev M. Savrié C. Schnier K. Schoenning W. Shan M. Shao C.p. Shen P.x. Shen X.y. Shen H.y. Sheng W.m. Song X.y. Song S. Sosio S. Spataro G.x. Sun J.f. Sun S.s. Sun X.h. Sun Y.j. Sun Y.z. Sun Z.j. Sun Z.t. Sun C.j. Tang X. Tang I. Tapan E.h. Thorndike M. Tiemens I. Uman G.s. Varner B. Wang B.l. Wang D. Wang D.y. Wang K. Wang L.l. Wang L.s. Wang M. Wang P. Wang P.l. Wang W. Wang W.p. Wang X.f. Wang Y. Wang Y.d. Wang Y.f. Wang Y.q. Wang Z. Wang Z.g. Wang Z.h. Wang Z.y. Wang T. Weber D.h. Wei P. Weidenkaff S.p. Wen U. Wiedner M. Wolke L.h. Wu L.j. Wu Z. Wu L. Xia L.g. Xia Y. Xia D. Xiao H. Xiao Z.j. Xiao Y.g. Xie Xie Yuehong Q.l. Xiu G.f. Xu J.j. Xu L. Xu Q.j. Xu Q.n. Xu X.p. Xu L. Yan W.b. Yan W.c. Yan Y.h. Yan H.j. Yang H.x. Yang L. Yang Y.x. Yang M. Ye M.h. Ye J.h. Yin Z.y. You B.x. Yu C.x. Yu J.s. Yu C.z. Yuan Y. Yuan A. Yuncu A.a. Zafar Y. Zeng Z. Zeng B.x. Zhang B.y. Zhang C.c. Zhang D.h. Zhang H.h. Zhang H.y. Zhang J. Zhang J.j. Zhang J.l. Zhang J.q. Zhang J.w. Zhang J.y. Zhang J.z. Zhang K. Zhang L. Zhang S.q. Zhang X.y. Zhang Y. Zhang Y.h. Zhang Y.n. Zhang Y.t. Zhang Yu Zhang Z.h. Zhang Z.p. Zhang Z.y. Zhang G. Zhao J.w. Zhao J.y. Zhao J.z. Zhao Lei Zhao Ling Zhao M.g. Zhao Q. Zhao Q.w. Zhao S.j. Zhao T.c. Zhao Y.b. Zhao Z.g. Zhao A. Zhemchugov B. Zheng J.p. Zheng W.j. Zheng Y.h. Zheng B. Zhong L. Zhou X. Zhou X.k. Zhou X.r. Zhou X.y. Zhou K. Zhu K.j. Zhu S. Zhu S.h. Zhu X.l. Zhu Y.c. Zhu Y.s. Zhu Z.a. Zhu J. Zhuang L. Zotti B.s. Zou J.h. Zou

subject

Nuclear and High Energy Physics BESIII детектор Electron–positron annihilation Analytical chemistry Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Luminosity NO лептоны 0103 physical sciences Absolute branching fraction 010306 general physics Nuclear Experiment Physics Annihilation 010308 nuclear & particles physics Branching fraction ?c +Absolute branching fraction; BESIII; Semi-leptonic decay; Λc+; Nuclear and High Energy Physics BESIII Λc+lcsh:QC1-999 Baryon BEPCII коллайдер Semi-leptonic decay High Energy Physics::Experiment Astrophysics::Earth and Planetary Astrophysics lcsh:Physics

description

Abstract We report the first measurement of the absolute branching fraction for Λ c + → Λ μ + ν μ . This measurement is based on a sample of e + e − annihilation data produced at a center-of-mass energy s = 4.6 GeV , collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb − 1 . The branching fraction is determined to be B ( Λ c + → Λ μ + ν μ ) = ( 3.49 ± 0.46 ( stat ) ± 0.27 ( syst ) ) % . In addition, we calculate the ratio B ( Λ c + → Λ μ + ν μ ) / B ( Λ c + → Λ e + ν e ) to be 0.96 ± 0.16 ( stat ) ± 0.04 ( syst ) .

year	journal	country	edition	language
2017-04-01

10.1016/j.physletb.2017.01.047 http://hdl.handle.net/11392/2369995