Lifetimes of Xi(+)(bc) and Xi(0)(bc) baryons

Estimates of the lifetimes and partial branching ratios for the baryons Xi( bc)(+) and Xi(bc)(0) are presented using the inverse heavy quark mass expan sion technique carried out in the operator product expansion approach. We t ake into account both the perturbative QCD corrections to the spectator con tributions and, depending on the quark contents of the hadrons, Pauli inter ference and weak scattering effects between the constituents, using a poten tial model for the evaluation of the non-perturbative parameters.