Journal
PHYSICAL REVIEW D
Volume 89, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.89.051104
Keywords
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Funding
- Ministry of Science and Technology of China [2009CB825204, 2009CB825200]
- National Natural Science Foundation of China (NSFC) [10625524, 10821063, 10825524, 10835001, 10935007, 11125525, 11235011]
- Joint Funds of the National Natural Science Foundation of China [11079008, 11179007]
- Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program
- CAS [KJCX2-YW-N29, KJCX2-YW-N45]
- 100 Talents Program of CAS
- German Research Foundation DFG under Collaborative Research Center [CRC-1044]
- Istituto Nazionale di Fisica Nucleare, Italy
- Ministry of Development of Turkey [DPT2006K-120470]
- U.S. Department of Energy [DE-FG02-04ER41291, DE-FG02-05ER41374, DE-FG02-94ER40823, DESC0010118]
- U.S. National Science Foundation
- University of Groningen (RuG)
- Helmholtzzentrum fur Schwerionenforschung GmbH (GSI), Darmstadt
- WCU Program of National Research Foundation of Korea [R32-2008-000-10155-0]
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We report a measurement of the branching fraction B(D+ -> mu(+)nu(mu)) = [3.71 +/- 0.19(stat) +/- 0.06(sys)] x 10(-4) based on 2.92 fb(-1) of data accumulated at root s = 3.773 GeV with the BESIII detector at the BEPCII collider. This measurement, in conjunction with the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cd vertical bar determined from a global Standard Model fit, implies a value for the weak decay constant f(D+) = (203.2 +/- 5.3 +/- 1.8) MeV. Additionally, using this branching fraction measurement together with a lattice QCD prediction for f(D+), we find vertical bar V-cd vertical bar 0.2210 +/- 0.0058 +/- 0.0047. In either case, these are the most precise results for these quantities to date.
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