Exclusive B→ K^** γ Decays in the QCD LCSR approach

2002/04/22 by A. S. Safir, Safir, A. S.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0204263

LaTeX,4 pages. Talk presented at the XXXVIIth Rencontres de Moriond: Electroweak Interactions and Unified Theories, Les Arcs, France, 9-16 March 2002

arxiv created 2002/04/22 · arxiv updated 2009/11/30

Abstract

We predict contributions of higher K-resonances to the radiative rare decays b→ sγ, in the framework of the QCD sum rules on the light cone (LCSR). Our calculations are restricted to the leading twist-two operators for K^*(892) and to the asymptotic wave function for the other K^**-mesons. Using experimental data on the semileptonic τ→ K^**ν_τ decays, we extract the corresponding decay constants for vector and axial-vector K^**-mesons. We present results for the corresponding branching ratios and compare them with the existing theoretical predictions.

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