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arXiv · hep-ph/0406261

B->pi,K,eta Decay Formfactors from Light-Cone Sum Rules

Patricia Ball·Roman Zwicky
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Abstract

We present an improved calculation of all B -> light pseudoscalar formfactors 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 10 to 13%. The dependence of the formfactors on the momentum transfer q^2 is parametrized in a simple way that is consistent with their analytical properties and is valid for all physical q^2. The uncertainty of the extrapolation in q^2 on the semileptonic decay rate Gamma(B -> pi e nu) is estimated to be 5%.

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Patricia Ball, Roman Zwicky. 2004-06-23. B->pi,K,eta Decay Formfactors from Light-Cone Sum Rules. https://doi.org/10.1142/9789812702326_0014

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