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Journal of High Energy Physics

, 2019:150 | Cite as

B →P and B →V form factors from B-meson light-cone sum rules beyond leading twist

  • N. Gubernari
  • A. Kokulu
  • D. van DykEmail author
Open Access
Regular Article - Theoretical Physics
First Online:
  • 23 Downloads

Abstract

We provide results for the full set of form factors describing semileptonic B-meson transitions to pseudoscalar mesons π, K, \( \overline{D} \) and vector mesons ρ, K∗, \( {\overline{D}}^{\ast } \). 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.

Keywords

QCD Phenomenology 
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Supplementary material

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© The Author(s) 2019

Authors and Affiliations

  1. 1.Physik DepartmentTechnische Universität MünchenGarchingGermany

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