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Measurement of the absolute branching fractions for purely leptonic D-s(+) decays

文献类型：期刊论文

作者Ablikim, M.3; Achasov, M. N.12,83; Adlarson, P.76; Ahmed, S.17; Albrecht, M.6; Aliberti, R.32; Amoroso, A.73,75; An, M. R.36; An, Q.53,70; Bai, X. H.64
刊名PHYSICAL REVIEW D
出版日期2021-09-21
卷号104期号:5页码:20
ISSN号2470-0010
DOI10.1103/PhysRevD.104.052009
通讯作者Ablikim, M.()
英文摘要We report new measurements of the branching fraction B(Dv), where lis either mu or tau (-> pi), based on 6.32 fbof electron-positron annihilation data collected by the BESIII experiment at six center-of-mass energy points between 4.178 and 4.226 GeV. Simultaneously floating the Ds -> mu mu components yields B(D -> tau) = (5.21 +/- 0.25 +/- 0.17) x 102, B(D -> mu mu) (5.35 +/- 0.13 +/- 0.16) x 103, and the ratio of decay widths R = Gamma(D -> tau tau)/Gamma -> mu&m)= 9.73-0.58 +/- 0.36, where the first uncertainties are statistical and the second systematic. No evidence of CP asymmetry is observed in the decay rates Ds +/- -> mu +/- v mu and D +/- -> tau +/-= (+2.9 +/- 4.8 +/- 1.0)%. Constraining our measurement to the Standard Model expectation of lepton universality (R = 9.75), we find the more precise results B(D -> tau = (5.22 +/- 0.10 +/- 0.14) x 10-2and A(+/-) = (-0.1 +/- 1.9 +/- 1.0)%. Combining our results with inputs external to our analysis, we determine the C -> (S) over bar quark mixing matrix element, D+ decay constant, and ratio of the decay constants to be vertical bar V vertical bar = 0.973 +/- 0.009 +/- 0.014, f D+ = 249.9 +/- 2.4 +/- 3.5 MeV, and f D+ / f D = 1.232 +/- 0.035, respectively.
资助项目National Key Research and Development Program of China[2020YFA0406400] ; National Key Research and Development Program of China[2020YFA0406300] ; National Natural Science Foundation of China (NSFC)[11625523] ; National Natural Science Foundation of China (NSFC)[11635010] ; National Natural Science Foundation of China (NSFC)[11735014] ; National Natural Science Foundation of China (NSFC)[11822506] ; National Natural Science Foundation of China (NSFC)[11835012] ; National Natural Science Foundation of China (NSFC)[11935015] ; National Natural Science Foundation of China (NSFC)[11935016] ; National Natural Science Foundation of China (NSFC)[11935018] ; National Natural Science Foundation of China (NSFC)[11961141012] ; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program ; NSFC[U1732263] ; NSFC[U1832207] ; CAS[U1732263] ; CAS[U1832207] ; CAS Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH003] ; CAS Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH040] ; 100 Talents Program of CAS ; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology ; ERC[758462] ; European Union[894790] ; German Research Foundation DFG[443159800] ; German Research Foundation DFG[CRC 1044] ; German Research Foundation DFG[FOR 2359] ; German Research Foundation DFG[GRK 214] ; Istituto Nazionale di Fisica Nucleare, Italy ; Ministry of Development of Turkey[DPT2006K-120470] ; National Science and Technology fund ; Olle Engkvist Foundation[200-0605] ; STFC (United Kingdom) ; Knut and Alice Wallenberg Foundation (Sweden)[2016.0157] ; Royal Society, UK[DH140054] ; Royal Society, UK[DH160214] ; Swedish Research Council ; U.S. Department of Energy[DE-FG02-05ER41374] ; U.S. Department of Energy[DE-SC-0012069]
WOS研究方向Astronomy & Astrophysics ; Physics
语种英语
WOS记录号WOS:000704619500001
出版者AMER PHYSICAL SOC
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program ; NSFC ; CAS ; CAS Key Research Program of Frontier Sciences ; 100 Talents Program of CAS ; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology ; ERC ; European Union ; German Research Foundation DFG ; Istituto Nazionale di Fisica Nucleare, Italy ; Ministry of Development of Turkey ; National Science and Technology fund ; Olle Engkvist Foundation ; STFC (United Kingdom) ; Knut and Alice Wallenberg Foundation (Sweden) ; Royal Society, UK ; Swedish Research Council ; U.S. Department of Energy
源URL[http://119.78.100.186/handle/113462/136177]  
专题中国科学院近代物理研究所
通讯作者Ablikim, M.
作者单位1.Univ Perugia, I-06100 Perugia, Italy
2.Inst Nucl & Particle Phys, Shanghai 200240, Peoples R China
3.Inst High Energy Phys, Beijing 100049, Peoples R China
4.Beihang Univ, Beijing 100191, Peoples R China
5.Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China
6.Bochum Ruhr Univ, D-44780 Bochum, Germany
7.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
8.Cent China Normal Univ, Wuhan 430079, Peoples R China
9.China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China
10.COMSATS Univ Islamabad, Lahore Campus,Def Rd,Off Raiwind Rd, Lahore 54000, Pakistan
推荐引用方式
GB/T 7714		 Ablikim, M.,Achasov, M. N.,Adlarson, P.,et al. Measurement of the absolute branching fractions for purely leptonic D-s(+) decays[J]. PHYSICAL REVIEW D,2021,104(5):20.
APA Ablikim, M..,Achasov, M. N..,Adlarson, P..,Ahmed, S..,Albrecht, M..,...&Zou, J. H..(2021).Measurement of the absolute branching fractions for purely leptonic D-s(+) decays.PHYSICAL REVIEW D,104(5),20.
MLA Ablikim, M.,et al."Measurement of the absolute branching fractions for purely leptonic D-s(+) decays".PHYSICAL REVIEW D 104.5(2021):20.

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来源：近代物理研究所

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