We investigate the heavy-to-heavy semileptonic decay $\Omega_b^- \rightarrow \Omega_c^0\,e\,\bar{ \nu_e}$ within the framework of the Hypercentral Constituent Quark Model (HCQM). The ground state masses of the involved baryons are evaluated by numerically solving the six-dimensional hyperradial Schr\"{ o}dinger equation, incorporating both hyper-Coulomb and linear confinement potentials along with spin-dependent interactions. The Heavy Quark Effective Field Theory (HQET) form factors are computed up to the subleading order, incorporating $1/m_Q$ corrections that account for finite mass effects beyond the heavy quark symmetry limit. These form factors are then employed to analyse the heavy-to-heavy semileptonic decay rate via helicity formalism. Our results for the decay width and branching ratio are compared with those from various theoretical approaches.
Categories: hep-ph