2006/11/30 by Damir Becirevic, Damir Bečirević, V. Lubicz +2 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph
paper · pdf · doi:10.1016/j.nuclphysb.2007.01.032
published as Nucl.Phys.B769:31-43,2007 · 17 pages, 3 figures
arxiv created 2006/12/01 · openalex publication_date 2007/02/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present the results of a lattice QCD calculation of the form factor relevant to B-->K*gamma decay. Our final value, T(0) = 0.24 +/- 0.03(+0.04/-0.01), is obtained in the quenched approximation, and by extrapolating T(q2=0;H--> K*)MH^(3/2) from the directly accessed H-heavy mesons to the meson B. We also show that the extrapolation from B-->K*gamma* to B-->K*gamma leads to a result consistent with the one quoted above. On the other hand, our results are not accurate enough to solve the SU(3) flavor breaking effects in the form factor and we quote T(q2=0;B--> K*)/T(q2=0;B-->rho)=1.2(1), as our best estimate.