B_{d,s}->rho, omega, K*, phi Decay Form Factors from Light-Cone Sum Rules Revisited

Details B_{d,s}->rho, omega, K*, phi Decay Form Factors from Light-Cone Sum Rules Revisited B_{d,s}->rho, omega, K*, phi Decay Form Factors from Light-Cone Sum Rules Revisited

2004-12-06

arxiv.org/abs/hep-ph/0412079v1

Phys.Rev.D71:014029,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

44 pages

Scientific paper

10.1103/PhysRevD.71.014029

We present an improved calculation of $B\to$ light vector form factors from light-cone sum rules, including one-loop radiative corrections to twist-2 and twist-3 contributions, and leading order twist-4 corrections. The total theoretical uncertainty of our results at zero momentum transfer is typically 10% and can be improved, at least in part, by reducing the uncertainty of hadronic input parameters. We present our results in a way which details the dependence of the form factors on these parameters and facilitates the incorporation of future updates of their values from e.g. lattice calculations. We also give simple and easy-to-inplement parametrizations of the $q^2$-dependence of the form factors which are valid in the full kinematical regime of $q^2$.

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