Measurement of B(D{sub s}{sup +}{yields}{mu}{sup +}{nu}{sub {mu}})
- Institute of High Energy Physics, Vienna (Austria)
- 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, Vol. 100, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.100.241801; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). Belle Collaboration; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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