Weak decays of doubly heavy baryons: the $1/2\to 3/2$ case

Abstract

As a continuation of our previous works, we investigate the weak decays of doubly heavy baryons into a spin-$3/2$ singly or doubly heavy baryon. Light-front approach is adopted to handle the dynamics in the transitions, in which the two spectator quarks are approximated as a diquark. Results for form factors are then used to calculate decay widths of semi-leptonic and nonleptonic processes. The flavor SU(3) symmetry and symmetry breaking effects in semi-leptonic decays modes are explored, and we point out that in charm sector, there are sizable symmetry breaking effects. For nonleptonic decay modes, we study only the factorizable channels induced by the external W-emission. We find that branching fractions for most 1/2 to 3/2 transitions are approximately one order of magnitude smaller than the corresponding ones for the 1/2 to 1/2 transitions. Parametric uncertainties are also investigated in detail. This work, together with our previous works, are beneficial to the experimental studies of doubly heavy baryons at LHC and other experiments.

23 pages, 2 figures

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• Sum rules for $CP$ asymmetries of charmed baryon decays in the $SU(3{)}_F$ limit
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• Towards a Heavy Diquark Effective Theory for Weak Decays of Doubly Heavy Baryons
• Light-Cone Sum Rules Analysis of ${\Xi }_{Q{Q}^{\prime }}\to {\Sigma }_{Q^{\prime }}$ Weak Decays
• Semileptonic weak decays of anti-triplet charmed baryons in the light-front formalism
• QCD sum rules analysis of weak decays of doubly heavy baryons: the $b\to c$ processes
• Weak decays of triply heavy baryons in light front approach
• Semileptonic decays of ${\Lambda }_c^{+}$ in dynamical approaches
• Tensor form factors of $P\to P,S,V$ and $A$ transitions within the standard and the covariant light-front approaches
• Strong Coupling Constants of the Doubly Heavy ${\Xi }_{QQ}$ Baryons with $\pi$ Meson
• Weak Radiative Decays of Anti-triplet Bottomed Baryons in Light-Front Quark Model
• Weak Decays of Doubly Heavy Baryons: ${\mathcal{B}}_{cc}\to \mathcal{B}{D}^{(\ast )}$
• Strong $B_{Q{Q}^{\prime }}^{\ast }{B}_{Q{Q}^{\prime }}V$ vertices and the radiative decays of $B_{QQ}^{\ast }\to B_{QQ}\gamma$ in the light-cone sum rules
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• Charmed baryon ${\Omega }_c^0\to {\Omega }^{-}{l}^{+}{\nu }_l$ and ${\Omega }_c^0\to {\Omega }_c^{-}{\pi }^{+}({\rho }^{+})$ decays in light cone sum rules
• $SU(3)$ Flavor Symmetry for Weak Hadronic Decays of ${\mathbf{B}}_{bc}$ Baryons
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• Mass spectra of bottom-charm baryons
• W-exchange contribution to the decays ${\Xi }_{cc}^{++}\to {\Xi }_c^{+(\prime )}{\pi }^{+}$ using light-cone sum rules
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• Angular distribution of the FCNC process $B_c\to D_s^{\ast }(\to D_s\pi ){\ell }^{+}{\ell }^{-}$
• 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
• Baryonic heavy-to-light form factors induced by tensor current in light-front approach
• Inclusive weak-annihilation decays and lifetimes of beauty-charmed baryons
• Analysis of FCNC ${\Xi }_{QQ}\to {\Lambda }_Q{l}^{+}{l}^{-}$ decay in light-cone sum rules
• Transition properties of Doubly Heavy Baryons
• Charmful two-body ${\Omega }_b$ decays in the light-front quark model
• Semileptonic decays of doubly charmed baryons with bag model
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• The effects of polarization on the observables in the decay ${\Xi }_{cc}^{++}\to {\Xi }_c^{+}\bar{\ell }{\nu }_{\ell }$