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Measurement of the Ds<(+)-> l(+)ve branching fractions and the decay constant fDs+
Inst High Energy Phys, Beijing 100049, Peoples R China..
GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
Inst High Energy Phys, Beijing 100049, Peoples R China..
Carnegie Mellon Univ, Pittsburgh, PA 15213 USA..
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2016 (English)In: PHYSICAL REVIEW D, ISSN 2470-0010, Vol. 94, no 7, 072004Article in journal (Refereed) Published
Abstract [en]

Using 482 pb(-1) of e(+) e(-) collision data collected at a center-of-mass energy of root s = 4.009 GeV with the BESIII detector, we measure the branching fractions of the decays D-s(+) -> u(+)v(u) and D-s(+) -> tau(+)v(tau). By constraining the ratio of decay rates of Ds(+) to tau(+)v(u) and to u(+)v(u) to the Standard Model prediction, the branching fractions are determined to be B(D-s(+) -> u(+)v(u) = (0.495 +/- 0.067 +/- 0.026)% and B(D-s(+) -> tau(+)v(tau) = (4.83 +/- 0.65 +/- 0.26)% Using these branching fractions, we obtain a value for the decay constant f(Ds+) of (241.0 +/- 16.3 +/- 6.5) MeV, where the first error is statistical and the second systematic.

Place, publisher, year, edition, pages
2016. Vol. 94, no 7, 072004
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-312999DOI: 10.1103/PhysRevD.94.072004ISI: 000385632500002OAI: oai:DiVA.org:uu-312999DiVA: diva2:1077012
Available from: 2017-02-24 Created: 2017-02-24 Last updated: 2017-02-24Bibliographically approved

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Andersson, Walter IkegamiJohansson, TordKupsc, AndrzejLi, CuiPettersson, JoachimSchoenning, KarinWolke, Magnus

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