Nonleptonic two-body decays of single heavy baryons ${\Lambda }_Q$, ${\Xi }_Q$, and ${\Omega }_Q$ $(Q=b,c)$ induced by $W$ emission in the covariant confined quark model

Abstract

We have made a survey of heavy-to-heavy and heavy-to-light nonleptonic heavy baryon two-body decays and have identified those decays that proceed solely via $W$-boson emission, i.e. via the tree graph contribution. Some sample decays are ${\Omega }_b^{-}\to {\Omega }_c^{(\ast )0}{\rho }^{-}({\pi }^{-}),{\Omega }_b^{-}\to {\Omega }^{-}J/\psi ({\eta }_c),{\Xi }_b^{0,-}\to {\Xi }^{0,-}J/\psi ({\eta }_c),{\Lambda }_b\to \Lambda J/\psi ({\eta }_c),{\Lambda }_b\to {\Lambda }_c{D}_s^{(\ast )},{\Omega }_c^0\to {\Omega }^{-}{\rho }^{+}({\pi }^{+})$, and ${\Lambda }_c\to p\varphi$. We make use of the covariant confined quark model previously developed by us to calculate the tree graph contributions to these decays. We calculate rates, branching fractions and, for some of these decays, decay asymmetry parameters. We compare our results to experimental findings and the results of other theoretical approaches when they are available. Our main focus is on decays to final states with a lepton pair because of their clean experimental signature. For these decays we discuss two-fold polar angle decay distributions such as in the cascade decay ${\Omega }_b^{-}\to {\Omega }^{-}(\to \Xi \pi ,\Lambda K^{-})+J/\psi (\to {\ell }^{+}{\ell }^{-})$. Lepton mass effects are always included in our analysis.

22 pages

References in corpus (12)

• Magnetic moments of heavy baryons in the relativistic three-quark model
• Measurement of the pseudoscalar mixing angle and ${\eta }^{\prime }$ gluonium content with KLOE detector
• Direct observation of the strange b baryon Xi_b^{-}
• Rare baryon decays Lambda_b -> Lambda l+ l- (l=e, mu, tau) and Lambda_b -> Lambda gamma : Differential and total rates, lepton- and hadron-side forward-backward asymmetries
• Observation of the doubly strange b baryon Omega_b-
• The study of leading twist light cone wave function of η_c meson
• Radiative decays of double heavy baryons in a relativistic constituent three-quark model including hyperfine mixing
• Decay chain information on the newly discovered double charm baryon state ${\Xi }_{cc}^{++}$
• Measurement of the parity-violating asymmetry parameter alpha_b and the helicity amplitudes for the decay Lambda_b->J/psi+Lambda with the ATLAS detector
• Measurements of Absolute Branching Fractions for ${\Lambda }_c^{+}\to {\Xi }^0{K}^{+}$ and $\Xi (1530{)}^0{K}^{+}$
• Measurement of the ${\Xi }_b^{-}$ and ${\Omega }_b^{-}$ baryon lifetimes
• Hadronic Weak Decay ${\mathcal{B}}_b({\frac{1}{2}}^{+})\to \mathcal{B}({\frac{1}{2}}^{+},{\frac{3}{2}}^{+})+V$

Cited by in corpus (36)

• Charmed Baryon Physics Circa 2021
• Recent Progress in Leptonic and Semileptonic Decays of Charmed Hadrons
• Structure and decays of hidden heavy pentaquarks
• Ab initio three-loop calculation of the W-exchange contribution to nonleptonic decays of double charm baryons
• Color-allowed Bottom Baryon to Charmed Baryon non-leptonic Decays
• U-Spin Sum Rules for CP Asymmetries of Three-Body Charmed Baryon Decays
• Charmed ${\Omega }_c$ weak decays into $\Omega$ in the light-front quark model
• Measurement of the ${\Lambda }_b^0\to J/\psi \Lambda$ angular distribution and the ${\Lambda }_b^0$ polarisation in $pp$ collisions
• Topological tensor invariants and the current algebra approach: Analysis of 196 nonleptonic two-body decays of single and double charm baryons -- a review
• Production of $P_c$ states in ${\Lambda }_b$ decays
• Toward discovering the excited $\Omega$ baryons through nonleptonic weak decays of ${\Omega }_c$
• Hadronic weak decays of the charmed baryon ${\Omega }_c$
• Novel ideas in nonleptonic decays of double heavy baryons
• Cabibbo-favored ${\Lambda }_c^{+}\to \Lambda a_0(980{)}^{+}$ decay in the final state interaction
• Time-reversal asymmetries and angular distributions in ${\Lambda }_b\to \Lambda V$
• First measurement of ${\mathrm{\Omega }}_{\mathrm{c}}^0$ production in pp collisions at $\sqrt{s}=13$ TeV
• 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
• Beauty baryon non-leptonic decays into decuplet baryons and $CP$-asymmetries based on $SU(3)$-Flavor analysis
• Charmonium decays of beauty baryons in the perturbative QCD approach
• Restudy of the color-allowed two-body nonleptonic decay of bottom baryons ${\Xi }_b$ and ${\Omega }_b$ supported by hadron spectroscopy
• Weak nonleptonic decays of vector B-mesons
• Bounds on lepton flavor violating physics and decays of neutral mesons from $\tau (\mu )\to 3\ell ,\ell \gamma \gamma$-decays
• Towards the understanding of heavy quarks hadronization: from leptonic to heavy-ion collisions
• Productions of $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ in $B_{(s)}$ and ${\Lambda }_b({\Xi }_b)$ decays
• Study of the nonleptonic decay ${\Xi }_c^0\to {\Lambda }_c^{+}{\pi }^{-}$ in the covariant confined quark model
• Topological $SU(3{)}_f$ approach for two-body ${\Omega }_c$ weak decays
• Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the ${\Omega }_c^0$ Baryon
• Measurement of the mass difference and relative production rate of the ${\Omega }_b^{-}$ and ${\Xi }_b^{-}$ baryons
• Observation of ${\Lambda }_b^0\to {\Lambda }_c^{+}{\bar{D}}^{(\ast )0}{K}^{-}$ and ${\Lambda }_b^0\to {\Lambda }_c^{+}{D}_s^{\ast -}$ decays
• Measurement of ${\Omega }_{\mathrm{c}}^0$ baryon production and branching-fraction ratio $\mathrm{BR}({\mathrm{\Omega }}_{\mathrm{c}}^0\to {\mathrm{\Omega }}^{-}{\mathrm{e}}^{+}{\nu }_{\mathrm{e}})/\mathrm{BR}({\mathrm{\Omega }}_{\mathrm{c}}^0\to {\mathrm{\Omega }}^{-}{\pi }^{+})$ in pp collisions at $\sqrt{s}$ = 13 TeV
• Polarization in (quasi-)two-body decays and new physics
• Analysis of the nonleptonic two-body decays of the $\Lambda$ hyperon
• Charmful two-body ${\Omega }_b$ decays in the light-front quark model
• Analysis of the semileptonic decays of ${\Xi }_{cc}$ and ${\Omega }_{cc}$ baryons in QCD sum rules
• Semileptonic decay of double strangeness heavy flavor baryons
• Observation of ${\Lambda }_b^0\to D^{+}p{\pi }^{-}{\pi }^{-}$ and ${\Lambda }_b^0\to D^{\ast +}p{\pi }^{-}{\pi }^{-}$ decays