2019/08/31 by Qin Chang, Li-Ting Wang, Xiao-Nan Li · 2 citations
Physics and Astronomy · #hep-ph #hep-ex
paper · pdf · doi:10.1007/jhep12(2019)102
published as JHEP 1912 (2019) 102 · 47pages, 6 figures, 10 tables. Revised version; Accepted for publication in JHEP
arxiv created 2019/11/26 · arxiv updated 2019/12/16
In this paper, we calculate the matrix element and form factors of vector-to-vector (V'→ V') transition within the standard light-front~(SLF) and covariant light-front~(CLF) quark models~(QMs), and investigate the self-consistency and Lorentz covariance of the CLF QM within two types of correspondences between the manifest covariant Bethe-Salpeter approach and the LF approach. The zero-mode and valence contributions to the form factors of V'→ V' transition in the CLF QM and their relation to the SLF results are analyzed, and the main conclusions obtained via the decay constants of vector and axial-vector mesons and form factors of P→ V transition in the previous works are confirmed again. Furthermore, we present our numerical predictions for the form factors of c→ (q,s) (q=u,d) induced D^*→ (K^* ,ρ), D^*s→ (ϕ ,K^*), J/Ψ→ (D^*s ,D^*), B^*c→ (B^*s ,B^*) transitions and b→ (q,s,c) induced B^*→ (D^* ,K^* ,ρ), B^*s→ (D^*s ,ϕ ,K^*), B^*c→ (J/Ψ ,D^*s ,D^*), Υ(1S)→ (Bc^* ,Bs^* ,B^*) transitions, which can be applied further to the relevant phenomenological studies of meson decays.