Advanced Predictions for Moments of the B->X_s+gamma Photon Spectrum

Details Advanced Predictions for Moments of the B->X_s+gamma Photon Spectrum Advanced Predictions for Moments of the B->X_s+gamma Photon Spectrum

2005-06-24

arxiv.org/abs/hep-ph/0506245v2

Phys.Rev. D72 (2005) 074025

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, 3 figures. Experimental data updated and correlations included in the fit; typos in eqs. (38) and (47) corrected. Ve

Scientific paper

10.1103/PhysRevD.72.074025

Based on a new, exact QCD factorization formula for the partial B->X_s+gamma decay rate with a restriction on large photon energy, improved predictions are presented for the partial moments and -^2 of the photon spectrum defined with a cut E_gamma>E_0. In the region where Delta=m_b-2E_0 is large compared with Lambda_{QCD}, a theoretical description without recourse to shape functions can be obtained. However, for Delta<

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