Paper: Oct 13,2024
hep-ph
ID:2410.09672
Semileptonic and nonleptonic decays of $B_{u,d,s,c}^{*}$ in the covariant light-front approach
The semileptonic and nonleptonic decays of the b-flavor vector mesons
$B^{*}_{u,d,s}$ and $B_{c}^{*}$ are investigated within the covariant
light-front quark model (CLFQM). By calculating the form factors of the
transitions $B_{u, d, s, c}^{*}\to P$ under the CLFQM, with $P$ denoting a
pseudoscalar meson, i.e., $\pi, K, \eta_c(1S,2S), D_{(s)}, B_{(s)}$, we predict
and discuss several physical observables, including the branching ratios,
polarization fractions $f_{L}, f_{\|}$, and forward-backward asymmetries
$A_{FB}$. The total widths of the single-photon radiative decay channels for
these b-flavor vector mesons are estimated using their partial widths.
In these considered decays, one can find that the semileptonic decays
$B_{s}^{*0}\to D_{s}^{-}\ell^{\prime+}{\nu}_{\ell^\prime}$ and $B_{c}^{*+}\to
B_{s}^{0}\ell^{\prime+}{\nu}_{\ell^\prime},
\eta_{c}\ell^{\prime+}{\nu}_{\ell^\prime}$, with $\ell^\prime$ being $e$ or
$\tau$, and the nonleptonic channels $B_{c}^{*+}\to B^0_{s} \pi^{+}, B^0_{s}
\rho^{+}$ have the largest branching ratios, which can reach up to the
$10^{-7}$ order, and are most likely to be accessible at the future
high-luminosity LHCb and Belle-II experiments.
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Paper Author: Si-Yang Wang,You-Ya Yang,Zhi-Jie Sun,Hao Yang,Peng Li,Zhi-Qing Zhang
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