Lattice-Constrained Parametrizations of Form Factors for Semileptonic and Rare Radiative B Decays

Details Lattice-Constrained Parametrizations of Form Factors for Semileptonic and Rare Radiative B Decays Lattice-Constrained Parametrizations of Form Factors for Semileptonic and Rare Radiative B Decays

1997-08-13

arxiv.org/abs/hep-lat/9708008v2

Phys.Lett.B416:392-401,1998

Physics

High Energy Physics

High Energy Physics - Lattice

14 pages, LaTeX, 5 eps figures, uses epsf and array packages. Version accepted for publication in Physics Letters B

Scientific paper

10.1016/S0370-2693(97)01350-6

We describe the form factors for B to rho lepton neutrino and B to K* gamma decays with just two parameters and the two form factors for B to pi lepton neutrino with a further two or three parameters. The parametrizations are consistent with heavy quark symmetry, kinematic constraints and lattice results, which we use to determine the parameters. In addition, we test versions of the parametrizations consistent (or not) with light-cone sum rule scaling relations at q^2=0.

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