Fit to moments of inclusive B→Xcl(ν)over-bar and B→Xsγ decay distributions using heavy quark expansions in the kinetic scheme -: art. no. 073008

被引:129
|
作者
Buchmüller, OL
Flächer, HU
机构
[1] CERN, CH-1211 Geneva 23, Switzerland
[2] Univ London, Egham TW20 0EX, Surrey, England
关键词
D O I
10.1103/PhysRevD.73.073008
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a fit to measured moments of inclusive distributions in B -> X(c)l (nu) over bar and B -> X(s)gamma decays to extract values for the Cabibbo-Kobayashi-Maskawa (CKM) matrix element \V-cb\, the b- and c-quark masses, and higher-order parameters that appear in the heavy quark expansion. The fit is carried out using theoretical calculations in the kinetic scheme and includes moment measurements of the BABAR, Belle, CDF, CLEO, and DELPHI collaborations for which correlation matrices have been published. We find parallel to V(cb)parallel to=(41.96 +/- 0.23(exp)+/- 0.35(HQE)+/- 0.59(Gamma SL))x10(-3) and m(b)=4.590 +/- 0.025(exp)+/- 0.030(HQE) GeV where the errors are experimental and theoretical respectively. We also derive values for the heavy quark distribution function parameters m(b) and mu(pi)(2) in different theoretical schemes that can be used as input for the determination of \V-ub\.
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页数:11
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