Relativistic description of the $\Xi_b$ baryon semileptonic decays

TL;DR

This paper provides a relativistic quark-diquark model analysis of $\\Xi_b$ baryon semileptonic decays, calculating decay form factors, rates, and asymmetries without nonrelativistic approximations, offering detailed theoretical predictions.

Contribution

It introduces a fully relativistic calculation of $\\Xi_b$ semileptonic decays within the quark-diquark framework, avoiding nonrelativistic and heavy quark expansions.

Findings

Calculated decay form factors with relativistic effects.

Predicted differential and total decay rates and asymmetries.

Provided decay rate ratios involving $\\tau$ and muon leptons.

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.