English

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

High Energy Physics - Phenomenology 2007-05-23 v1

Abstract

We predict contributions of higher KK-resonances to the radiative rare decays bsγb\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)K^*(892) and to the asymptotic wave function for the other KK^{**}-mesons. Using experimental data on the semileptonic τKντ\tau\to K^{**}\nu_{\tau} decays, we extract the corresponding decay constants for vector and axial-vector KK^{**}-mesons. We present results for the corresponding branching ratios and compare them with the existing theoretical predictions.

Keywords

Cite

@article{arxiv.hep-ph/0204263,
  title  = {Exclusive $B\to K^{**} \gamma$ Decays in the QCD LCSR approach},
  author = {A. S. Safir},
  journal= {arXiv preprint arXiv:hep-ph/0204263},
  year   = {2007}
}

Comments

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