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arXiv · 1810.03388

Relativistic description of the $Ξ_b$ baryon semileptonic decays

R. N. Faustov·V. O. Galkin
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Abstract

Semileptonic decays of the $Ξ_b$ 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 $Ξ_b\to Ξ_c\ellν_\ell$ and heavy-to-light $Ξ_b\to Λ\ellν_\ell$ semileptonic decays. Predictions for the ratios of such decays involving $τ$ lepton and muon are presented.

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R. N. Faustov, V. O. Galkin. 2018-10-08. Relativistic description of the $Ξ_b$ baryon semileptonic decays. https://doi.org/10.1103/physrevd.98.093006

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