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Gubernari, N.; Kokulu, A.; van Dyk, D.
The journal of high energy physics, 01/2019, Letnik: 2019, Številka: 1Journal Article
A bstract 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.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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