Systematic analysis of the form factors of B_c→η_c, J/ψ and corresponding weak decays

2024/06/12 by Guoliang Yu, Yu, Guo-Liang, Bin Wu +5 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2406.08181

openalex publication_date 2024/06/12 · openalex created_date 2024/06/14 · openalex updated_date 2026/07/28

Abstract

The form factors of B_c→η_c and B_c→ J/ψ are analyzed in the framework of three-point QCD sum rules. In these analyses, the contributions of the vacuum condensate terms ⟨ g_s²GG⟩ and ⟨ g_s³GGGf⟩ are considered. In addition, the decay widths and branching ratios of several decay channels are obtained by using the calculated form factors. These decay processes include the nonleptonic decays of B_c^- → η_c π^-, η_c K^-, η_c ρ^-, η_c K^*-, B_c^- → J/ψπ^-, J/ψK^-, J/ψρ^-, J/ψK^*-, and the semileptonic decays of B_c^- → η_c l ν, B_c^- → J/ψl ν. These results about the form factors and decay properties of B_c meson provide useful information for us to study the heavy-quark dynamics and find new physics(NP) beyond Standard Model(SM).

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