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Measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu)
Inst High Energy Phys, Beijing 100049, Peoples R China..
RAS, GI Budker Inst Nucl Phys BINP, SB, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
Inst High Energy Phys, Beijing 100049, Peoples R China..
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2017 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 767, p. 42-47Article in journal (Refereed) Published
Abstract [en]

We report the first measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu).This measurement is based on a sample of e+e(-) annihilation data produced at a center-of-mass energy root 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( Lambda(+)(c) -> Lambda mu(+)nu(mu)) = (3.49 +/- 0.46( stat) +/- 0.27( syst))%. In addition, we calculate the ratio B( Lambda(+)(c) -> Lambda mu(+)nu(mu))/B(Lambda(+)(c) -> Lambda e(+)nu(e) to be 0.96 +/- 0.16( stat) +/- 0.04( syst).

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2017. Vol. 767, p. 42-47
Keywords [en]
Lambda(+)(c), Semi-leptonic decay, Absolute branching fraction, BESIII
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-320020DOI: 10.1016/j.physletb.2017.01.047ISI: 000397861700008OAI: oai:DiVA.org:uu-320020DiVA, id: diva2:1088910
Funder
German Research Foundation (DFG), CRC 1044 FOR 2359Swedish Research Council, DE-FG02-05ER41374 DE-SC-0010504 DE-SC0012069 DESC0010118Swedish Energy Agency, DE-FG02-05ER41374 DE-SC-0010504 DE-SC0012069 DESC0010118Available from: 2017-04-18 Created: 2017-04-18 Last updated: 2017-11-29Bibliographically approved

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