Eur Phys J C (2004) 33: s262-s264
https://doi.org/10.1140/epjcd/s2003-03-128-y

PS01 Heavy Flavour Physics

Constraining the unitarity triangle with B→ K ^* γ and B→ρ γ

Institute for High-Energy Phenomenology, Newman Laboratory for Elementary-Particle Physics, Cornell University, Ithaca, NY 14853, U.S.A. CLNS 03/1847,  

Received: 28 October 2003
Accepted: 7 November 2003
Published online: 25 November 2003

Abstract

We discuss the exclusive radiative decays B→ K ^* γ and B →ρ γ in QCD factorization within the Standard Model. The analysis is based on the heavy-quark limit of QCD. Our results for these decays are complete to next-to-leading order in QCD and to leading order in the heavy-quark limit. Phenomenological implications for branching ratios and isospin breaking effects are discussed. Special emphasis is placed on constraining the CKM unitarity triangle from these observables.