Measurement of the moments of the photon energy spectrum in B{yields}X{sub s}{gamma} decays and determination of |V{sub cb}| and m{sub b} at Belle
- Institute of High Energy Physics, Vienna (Austria)
- University of Melbourne, School of Physics, Victoria 3010 (Australia)
- High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
Using the previous Belle measurement of the inclusive photon energy in B{yields}X{sub s}{gamma} decays, we determine the first and second moments of this spectrum for minimum photon energies in the B meson rest frame ranging from 1.8 to 2.3 GeV. Combining these measurements with recent Belle data on the lepton energy and hadronic mass moments in B{yields}X{sub c}l{nu} decays, we perform fits to theoretical expressions derived in the 1S and kinetic mass schemes and extract the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element V{sub cb}, the b-quark mass, and other nonperturbative parameters. In the 1S scheme analysis we find |V{sub cb}|=(41.56{+-}0.68(fit){+-}0.08({tau}{sub B}))x10{sup -3} and m{sub b}{sup 1S}=(4.723{+-}0.055) GeV. In the kinetic scheme, we obtain |V{sub cb}|=(41.58{+-}0.69(fit){+-}0.08({tau}{sub B}){+-}0.58(th))x10{sup -3} and m{sub b}{sup kin}=(4.543{+-}0.075) GeV.
- OSTI ID:
- 21250590
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 3; Other Information: DOI: 10.1103/PhysRevD.78.032016; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fit to moments of inclusive B{yields}X{sub c}l{nu} and B{yields}X{sub s}{gamma} decay distributions using heavy quark expansions in the kinetic scheme
Advanced predictions for moments of the B{yields}X{sub s}{gamma} photon spectrum