Relativistic description of the ${\Xi }_b$ baryon semileptonic decays

Abstract

Semileptonic decays of the ${\Xi }_b$ baryon are studied in the framework of the relativistic quark-diquark model based on the quasipotential approach. The weak decay form factors are calculated with the comprehensive account of all relativistic effects without employing nonrelativistic and heavy quark expansions. On this basis differential and total decay rates as well as different asymmetry parameters are calculated for the heavy-to-heavy ${\Xi }_b\to {\Xi }_c\ell {\nu }_{\ell }$ and heavy-to-light ${\Xi }_b\to \Lambda \ell {\nu }_{\ell }$ semileptonic decays. Predictions for the ratios of such decays involving $\tau$ lepton and muon are presented.

9 pages, 7 figures

References in corpus (5)

• Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture
• The semileptonic decay Lambda_b -> Lambda_c + tau(-) + antinu_tau in the covariant confined quark model
• Semileptonic decays of heavy baryons in the relativistic quark model
• Semileptonic decays of ${\Lambda }_b$ baryons in the relativistic quark model
• New analysis of semileptonic B decays in the relativistic quark model

Cited by in corpus (14)

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• Electromagnetic form factors of octet baryons with the nonlocal chiral effective theory
• Restudy of the color-allowed two-body nonleptonic decay of bottom baryons ${\Xi }_b$ and ${\Omega }_b$ supported by hadron spectroscopy
• Productions of $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ in $B_{(s)}$ and ${\Lambda }_b({\Xi }_b)$ decays
• New physics in the angular distribution of $B_c^{-}\to J/\psi (\to {\mu }^{+}{\mu }^{-}){\tau }^{-}(\to {\pi }^{-}{\nu }_{\tau }){\bar{\nu }}_{\tau }$ decay
• Heavy quark symmetry of ${\Lambda }_b^0$ decays in quark models
• Analysis of the semileptonic decays ${\Lambda }_b\to {\Lambda }_{c}l{\bar{\nu }}_l$ and ${\Xi }_b\to {\Xi }_{c}l{\bar{\nu }}_l$ in QCD sum rules
• Semileptonic baryon decays ${\Xi }_b\to {\Xi }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ in perturbative QCD
• Electromagnetic and weak decay of singly Heavy Baryons (Qqq)
• Analysis of the semileptonic decays of ${\Xi }_{cc}$ and ${\Omega }_{cc}$ baryons in QCD sum rules
• Semileptonic neutral current decays of ${\Xi }_b$ with dileptons or dineutrinos in the final state
• Baryons and baryoniums in the perspective of QCD sum rules
• Semileptonic decay form factors of ${\Xi }_b^0\to {\Xi }_c^{+}\ell {\bar{\nu }}_{\ell }$ in HQET
• Analysis of the semileptonic decays ${\Sigma }_b\to {\Sigma }_{c}l{\bar{\nu }}_l$, ${\Xi }_b^{\prime }\to {\Xi }_c^{\prime }l{\bar{\nu }}_l$ and ${\Omega }_b\to {\Omega }_{c}l{\bar{\nu }}_l$ in QCD sum rules