Exclusive $B\to K^{**} γ$ Decays in the QCD LCSR approach

Details Exclusive $B\to K^{**} γ$ Decays in the QCD LCSR approach Exclusive $B\to K^{**} γ$ Decays in the QCD LCSR approach

2002-04-22

arxiv.org/abs/hep-ph/0204263v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX,4 pages. Talk presented at the XXXVIIth Rencontres de Moriond: Electroweak Interactions and Unified Theories, Les Arcs,

Scientific paper

We predict contributions of higher $K$-resonances to the radiative rare decays $b\to s\gamma$, 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 $\tau\to K^{**}\nu_{\tau}$ 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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