SU(3) Breaking of Leading--Twist K and K* Distribution Amplitudes - a Reprise

Details SU(3) Breaking of Leading--Twist K and K* Distribution Amplitudes - a Reprise SU(3) Breaking of Leading--Twist K and K* Distribution Amplitudes - a Reprise

2005-10-26

arxiv.org/abs/hep-ph/0510338v1

Phys.Lett.B633:289-297,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 6 figures

Scientific paper

10.1016/j.physletb.2005.11.068

We review the status of the leptonic decay constants f_K and f_K^{\parallel,\perp} of the K and K*, respectively, and the SU(3) breaking quantities a_1(K) and a_{1}^{\parallel,\perp}(K*), the first Gegenbauer-moments of the leading-twist distribution amplitudes of K and K*. We obtain new predictions from QCD sum rules which are relevant for the calculation of K and K* form factors, for instance T_1^{B->K*}, which determines the decay B -> K* gamma, and for QCD factorisation calculations of nonleptonic B decays into strange mesons, for instance B -> K pi.

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