Measurement of B(D{sub s}{sup +}{yields}{mu}{sup +}{nu}{sub {mu}})

Journal Article · Fri Jun 20 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.241801· OSTI ID:21134038

Widhalm, L; Mandl, F; Mitaroff, W ^[1]; Adachi, I; Brodzicka, J; Haba, J; Hazumi, M; Itoh, R; Iwasaki, Y; Katayama, N; Kichimi, H; Krokovny, P; Nakao, M; Nishida, S; Ozaki, H; Sakai, Y; Suzuki, S Y; Takasaki, F; Tanaka, M; Trabelsi, K ^[2]

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1. Institute of High Energy Physics, Vienna (Austria)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

We present a measurement of the branching fraction B(D{sub s}{sup +}{yields}{mu}{sup +}{nu}{sub {mu}}) using a 548 fb{sup -1} data sample collected by the Belle experiment at the KEKB e{sup +}e{sup -} collider. The D{sub s} momentum is determined by reconstruction of the system recoiling against DK{gamma}X in events of the type e{sup +}e{sup -}{yields}D{sub s}*DKX, D{sub s}*{yields}D{sub s}{gamma}, where X represents additional pions or photons from fragmentation. This full-reconstruction method provides high resolution in the neutrino momentum and thus good background separation, equivalent to that achieved by experiments at the tau-charm factories. We obtain the branching fraction B(D{sub s}{sup +}{yields}{mu}{sup +}{nu}{sub {mu}})=[6.44{+-}0.76(stat){+-}0.57(syst)]x10{sup -3}, implying a D{sub s} decay constant of f{sub D{sub s}}=[275{+-}16(stat){+-}12(syst)] MeV.

• OSTI ID: 21134038
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
D S MESONS
MEV RANGE 100-1000
MUON NEUTRINOS
PARTICLE DECAY
PHOTONS
PIONS