Bottom baryon decays to pseudoscalar meson and pentaquark

Based on SU(3) flavor symmetry, we decompose the decay amplitudes of bottom baryon decays to a pseudoscalar meson and an octet (a decuplet) pentaquark in terms of three (two) invariant amplitudes T-1 and T-2,T-3 ((T) over tilde (1) and (T) over tilde (2)) corresponding to external W-emission and internal W-emission diagrams, respectively. For antitriplet bottom baryons Lambda(0)(b), Xi(0)(b), and Xi(-)(b), their decays to a decuplet pentaquark proceed only through the internal W-emission diagram. Assuming the dominance from the external W-emission amplitudes, we present an estimate of the decay rates relative to Lambda(0)(b) -> Pp+K-, where P-p(+) is the hidden-charm pentaquark with the same light-quark content as the proton. Hence, our numerical results will provide a very useful guideline to the experimental search for pentaquarks in bottom baryon decays. For example, Xi(0)(b) -> P Sigma+K-, Xi(-)(b) -> P Sigma-(K) over bar (0), Omega(-)(b) -> P Xi-(K) over bar (0), and Omega(-)(b) -> P Xi 0K- may have rates comparable to that of Lambda(0)(b) -> Pp+K- and these modes should be given the higher priority in the experimental searches for pentaquarks.