Restudy of the color-allowed two-body nonleptonic decay of bottom baryons ${\Xi }_b$ and ${\Omega }_b$ supported by hadron spectroscopy

Abstract

In this work, we calculate the branching ratios of the color-allowed two-body nonleptonic decays of the bottom baryons, which include the ${\Xi }_b\to {\Xi }_c^{(\ast )}$ and ${\Omega }_b\to {\Omega }_c^{(\ast )}$ weak transitions by emitting a pseudoscalar meson (${\pi }^{-}$, $K^{-}$, $D^{-}$, and $D_s^{-}$) or a vector meson (${\rho }^{-}$, $K^{\ast -}$, $D^{\ast -}$, and $D_s^{\ast -}$). For achieving this aim, we adopt the three-body light-front quark model with the support of hadron spectroscopy, where the spatial wave functions of these heavy baryons involved in these weak decays are obtained by a semirelativistic potential model associated with the Gaussian expansion method. Our results show that these decays with the ${\pi }^{-}$, ${\rho }^{-}$, and $D_s^{(\ast )-}$-emitted mode have considerable widths, which could be accessible at the ongoing LHCb and Belle II experiments.

12 pages, 2 figures and 8 tables. Accepted by Phys. Rev. D

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• Angular distribution of the FCNC process $B_c\to D_s^{\ast }(\to D_s\pi ){\ell }^{+}{\ell }^{-}$
• Transition form factors and angular distributions of the ${\mathbf{\Lambda }}_{\mathbf{b}}\to \mathbf{\Lambda }(1520)(\to \mathbf{N}\bar{\mathbf{K}}){\mathbf{\ell }}^{+}{\mathbf{\ell }}^{-}$ decay supported by baryon spectroscopy
• Investigating the transition form factors of ${\Lambda }_b\to {\Lambda }_c(2625)$ and ${\Xi }_b\to {\Xi }_c(2815)$ and the corresponding weak decays with support from baryon spectroscopy
• Semileptonic baryon decays ${\Xi }_b\to {\Xi }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ in perturbative QCD
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