Published January 2019 | Version v1
Journal article

BP and BV form factors from B-meson light-cone sum rules beyond leading twist

  • 1. Technische Universität München, Physik Department (Germany)

Description

We provide results for the full set of form factors describing semileptonic B-meson transitions to pseudoscalar mesons π, K, D¯ and vector mesons ρ, K, D¯. Our results are obtained within the framework of QCD Light-Cone Sum Rules with B-meson distribution amplitudes. We recalculate and confirm the results for the leading-twist two-particle contributions in the literature. Furthermore, we calculate and provide new expressions for the two-particle contributions up to twist four. Following new developments for the three-particle distribution amplitudes, we calculate and provide new results for the complete set of three-particle contributions up to twist four. The form factors are computed numerically at several phase space points using up-to-date input parameters, including correlations across phase space points and form factors. We use a model ansatz for all contributing B-meson distribution amplitudes that is self-consistent up to twist-four accuracy. We find that the higher-twist two-particle contributions have a substantial impact on the results, and dominate over the three-particle contributions. Our numerical results, including correlations, are provided as machine-readable files in the supplementary material. We discuss the qualitative phenomenological impact of our results on the present b anomalies.

Additional details

Identifiers

Publishing Information

Journal Title
Journal of High Energy Physics (Online)
Journal Volume
2019
Journal Issue
1
Journal Page Range
p. 1-45
ISSN
1029-8479

Optional Information

Copyright
Copyright (c) 2019 The Author(s)