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

N. Gubernari¹,
A. Kokulu¹ &
D. van Dyk¹

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A preprint version of the article is available at arXiv.

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.

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Perturbative corrections to B → D form factors in QCD

Article Open access 13 June 2017

QCD calculations of B → π, K form factors with higher-twist corrections

Article Open access 03 January 2019

\( B\to {D}_0^{\ast } \) and \( {B}_s\to {D}_{s0}^{\ast } \) form factors from QCD light-cone sum rules

Article Open access 01 December 2023

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Physik Department, Technische Universität München, James-Franck-Straße 1, D-85748, Garching, Germany
N. Gubernari, A. Kokulu & D. van Dyk

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N. Gubernari
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A. Kokulu
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Gubernari, N., Kokulu, A. & van Dyk, D. B →P and B →V form factors from B-meson light-cone sum rules beyond leading twist. J. High Energ. Phys. 2019, 150 (2019). https://doi.org/10.1007/JHEP01(2019)150

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Received: 13 November 2018
Accepted: 26 December 2018
Published: 17 January 2019
DOI: https://doi.org/10.1007/JHEP01(2019)150

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QCD Phenomenology