Heavy flavor conserved semi-leptonic decay of B_s in the covariant light-front approach

2023/07/06 by Shi, Yu-Ji, Xing, Zhi-Peng · 1 citation
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2307.02767

Abstract

We study the heavy flavor conserved semi-leptonic decay B_s→ Bℓν in the covariant light front approach. The covariant light front quark model is used to calculate the transition form factors of B_s→ B^(*) as well as D_s→ D, which are consistent with the leading power predictions from the heavy quark symmetry. The angular distribution analysis on the B_s→ B^(*)lν decay is performed by investigating the forward-backward asymmetry of the lepton. We also study the angular distribution of B_s→ B^*(→ B γ)lν decay both through the lepton forward-backward asymmetry and the azimuth angle. The branching fractions of B_s→ Blν and B_s→ B^*lν are at the order 10^-8 and 10^-9, respectively. The number of B_s→ B lν events is estimated to be 1.76. The branching fraction of B_s→ B^*(→ B γ)lν is at the order 10^-11, which is calculated by introducing Breit-Wigner distribution for the intermediate B^*.

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