Weak decays of B_s to D_s based on the helicity analysis

2024/09/04 by Rahmani, Sara
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2409.02460

Abstract

Employing dipole and exponential hadronic transition form factors and helicity analysis combined with the Lattice QCD input, we present a detailed study of the decays B_s → D_s^(*)ℓ ν_ℓ. B_s → D_s + P(V), where P = π⁺, K⁺, D_s⁺ and V = ρ⁺, K^*+, D_s^*+, are also investigated and their branching fractions are examined. At the large recoil point, we calculate f _{+ ,0}^B_s → D_s(0) = 0.67 ± 0.01 for both parameterizations. Then we evaluate the branching fractions BR(B_s → D_sℓ ν) and BR(B_s → D_sℓ ν), which leads to R(D_s) = 0.298 ± 0.123. The ratios \fracΓ(B_s⁰ → D_s^ - μ^ + ν_μ)Γ(B_s⁰ → D_s^{* -} μ^ + ν_μ) are found to be 0.4415 ± 0.1860 and 0.4406 ± 0.1854, which are in good agreement of recent LHCb collaboration measurement. We also calculate the physical observables, A_FB^ℓ ,P_L^ℓ ,P_T^ℓ ,C_F^ℓ ,F_L^ℓ .

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