2024/06/10 by H. L. Jiang, Jiang, Hua-Yu, Su-Ping Jin +1
Earth and Planetary Sciences · Materials Science · Medicine · #Environmental Monitoring and Data Management #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Magnetism in coordination complexes #Metastasis and carcinoma case studies
paper · pdf · doi:10.48550/arxiv.2406.06209
openalex publication_date 2024/06/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present an improved calculation of the HHV (H=D(s), B(s), V= ρ, K^∗, ω, and ϕ) coupling constants gHHV beyond leading order in αs from QCD light-cone sum rules (LCSRs) by means of the light-cone distribution amplitudes (LCDAs) of light vector mesons. Near the light-cone, the next-to-leading order QCD corrections for the vacuum-to-vector-meson correlation function are included at leading power in δV = mV/mQ (Q=b,c) within the framework of hard-collinear factorization. The higher-twist corrections from two-particle and three-particle vector meson LCDAs are systematically incorporated at leading order in αs by applying the method of background field in LCSRs. Based on these improvements, we perform a systematic computation of the strong coupling constants gH HV and extract the effective coupling β of the heavy meson chiral perturbation theory (HMχPT). Furthermore, we accomplish the analysis for the relation between the coupling gHHV and the residue of the H→ V transition form factor A0 at heavy pseudoscalar pole. Additionally, we provide a detailed investigation of the SU(3) flavour symmetry breaking effects and conduct a comparative analysis with results from previous studies.