Study of form factors and branching ratios for D→ S,Alν_l with light-cone sum rules

2021/02/24 by Qi Huang, Y. Sun, Huang, Qi +9
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2102.12241

openalex publication_date 2021/02/24 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28

Abstract

We systematically study the semileptonic decay process of D→ S,A lν_l(l=e,μ) by light-cone sum rules (LCSR) with chiral currents, calculate the form factors containing only the contribution of the leading twist light-cone distribution amplitudes (LCDAs). For scalar mesons a₀(980) and a₀(1450), we take them as qq states. For axial-vector meson, we study a₁(1260)( 1³p¹) and b₁(1235)( 1¹p¹). Based on the results of these form factors, we further present the branching ratios of these semileptonic decay processes. The numerical results for D→ a₀(980), b₁(1235)lν_l are in good agreement with experiments and that for D→ a₀(1450)lν_l process are expected to be tested experimentally in the future.

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