Semileptonic bc to cc Baryon Decay and Heavy Quark Spin Symmetry

Understand

We study the semileptonic decays of the lowest-lying bc baryons to the lowest-lying cc baryons (Xi_{bc}^{(\prime*)}--> Xi_{cc}^{(*)} and Omega_{bc}^{(\prime*)}--> Omega_{cc}^{(*)}), in the limit m_b, m_c >> Lambda_{QCD} and close to the zero recoil point.

• The separate heavy quark spin symmetries make it possible to describe all these decays using a single form factor.
• We recover results derived previously by White and Savage in a manner which we think is more straightforward and parallels the method applied later to study Bc semileptonic decays.
• We further discuss the resemblance between the bc baryon decays and those of Bc mesons to eta_c and J/\psi mesons and comment on the relation between the slopes of the single functions describing each set of decays.