Light quark decays of doubly heavy baryons in light front approach

Abstract

We explore the semileptonic and nonleptonic decays of doubly heavy baryons $({\Omega }_{cc}^{(\ast )+},{\Omega }_{bb}^{(\ast )0},{\Omega }_{bc}^{(\ast )-},{\Omega }_{bc}^{\prime 0})$ induced by the $s\to u$ transition. Hadronic form factors are parametrized by transition matrix elements and are calculated in the light front quark model. With the form factors, we make use of helicity amplitudes and analyze semileptonic and nonleptonic decay modes of doubly heavy baryons. Benchmark results for partial decay widths, branching fractions, forward-backward asymmetries and other phenomenological observables are derived. We find that typical branching fractions for semileptonic decays into $\ell \bar{\nu }$ are at the order $10^{-7}-10^{-8}$ and the ones for nonleptonic decays are at the order $10^{-5}$, which are likely detectable such as in LHCb experiment. With the potential data accumulated in future, our results may help to shape our understanding of the decay mechanism in the presence of two heavy quarks.

18 pages,8 figures

References in corpus (16)

• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Observation of the doubly charmed baryon ${\Xi }_{cc}^{++}$
• Baryons with two heavy quarks: Masses, production, decays, and detection
• Weak Decays of Doubly Heavy Baryons: SU(3) Analysis
• Weak Decays of Doubly Heavy Baryons: the $1/2\to 1/2$ case
• Mass spectra and radiative transitions of doubly heavy baryons in a relativized quark model
• Magnetic moments of the doubly charmed and bottomed baryons
• $B_s\to D_s(3040)$ form factors and $B_s$ decays into $D_s(3040)$
• Light-Cone Sum Rules Analysis of ${\Xi }_{Q{Q}^{\prime }q}\to {\Lambda }_{Q^{\prime }}$ Weak Decays
• Observation of the doubly charmed baryon decay ${\Xi }_{cc}^{++}\to {\Xi }_c^{{}^{\prime }+}{\pi }^{+}$
• Measurement of ${\Xi }_{cc}^{++}$ production in $pp$ collisions at $\sqrt{s}=13$ TeV
• Search for the doubly charmed baryon ${\Xi }_{cc}^{+}$ in the ${\Xi }_c^{+}{\pi }^{-}{\pi }^{+}$ final state
• 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
• W-exchange contribution to the decays ${\Xi }_{cc}^{++}\to {\Xi }_c^{+(\prime )}{\pi }^{+}$ using light-cone sum rules
• Inclusive weak-annihilation decays and lifetimes of beauty-charmed baryons

Cited by in corpus (3)

• Baryons in the light-front approach: The three-quark picture
• Mass spectra of bottom-charm baryons
• Baryonic heavy-to-light form factors induced by tensor current in light-front approach