Please use this identifier to cite or link to this item: http://hdl.handle.net/2307/237
Title: An estimate of the B --> K* γ Decay Form Factor
Authors: Becirevic, Damir
Lubicz, Vittorio
Mescia, Federico
Keywords: Lattice QCD
B-physics
Weak decays
Issue Date: Apr-2007
Publisher: Eklsevier
Abstract: We present the results of a lattice QCD calculation of the form factor relevant to B→K*γ 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*γ* (q2≠0) to B→K*γ (q2=0), 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 TB→K*(0)/TB→ρ(0)=1.2(1), as our best estimate.
URI: http://hdl.handle.net/2307/237
DOI: 10.1016/j.nuclphysb.2007.01.032
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

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