Form factors of B(s) to light scalar mesons with the B -meson light-cone sum rules

Abstract

In this work, the transition form factors of the semileptonic decays of B(s) to the light scalar mesons with masses close to 1.5 GeV such as K0*(1430),a0(1450), and f0(1500) are calculated in the framework of the light-cone sum rules. For this purpose, the two- and three-particle B-meson distribution amplitudes (DAs) are used. Note that it is possible to use the B-meson DAs for the Bs meson in the SU(3)F symmetry limit. The transition form factors are obtained in terms of the two-particle DAs up to twist-five accuracy, and the three-particle up to twist-six level. We apply two classes of the phenomenological models for the DAs of the B meson. The longitudinal lepton polarization asymmetries and branching fractions for the semileptonic decays of B(s) to the light scalar mesons are estimated with the help of these form factors. Published by the American Physical Society 2024