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

被引：183

作者：

Gubernari, N. ^{[1
]}

Kokulu, A. ^{[1
]}

van Dyk, D. ^{[1
]}

机构：

[1] Tech Univ Munich, Dept Phys, James Franck Str 1, D-85748 Garching, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2019年 / 2019卷 / 01期

关键词：

QCD Phenomenology; QCD; DECAYS; SYMMETRY; LIMIT;

D O I：

10.1007/JHEP01(2019)150

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We provide results for the full set of form factors describing semileptonic B-meson transitions to pseudoscalar mesons , 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.

引用

页数：45

共 111 条

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