Lambda_b and Lambda_c baryon decays at finite values of heavy quark masses

TL;DR

This paper investigates semileptonic decays of Lambda_b and Lambda_c baryons using a relativistic three-quark model with finite heavy quark masses, highlighting the significance of finite mass corrections in decay processes.

Contribution

It provides a detailed calculation of decay form factors and rates considering finite heavy quark masses, extending previous heavy quark limit analyses.

Findings

Finite mass corrections are significant in heavy-to-light transitions.

Finite mass effects are non-negligible in heavy-to-heavy transitions.

Calculated decay rates align with experimental data.

Abstract

Semileptonic decays of Lambda_b and Lambda_c baryons are studied within the Relativistic Three-Quark Model using finite heavy quark mass values. Employing the same parameters as have been used previously for the description of exclusive decays of heavy baryons in the heavy quark limit we calculate the six form factors of the process and the corresponding decay rates. Our calculation shows that the ``finite mass'' corrections are important in heavy-to-light transitions and are not negligible in heavy-to-heavy transitions.