Three-body charmless baryonic B¯s0 decays

We study for the first time the three-body charmless baryonic decays B¯s0→p¯ΛM+(pΛ¯M−), with M=π,K. We find that the branching ratios of B¯s0→(p¯ΛK+ and pΛ¯K−) and B¯s0→pΛ¯π− are (5.1±1.1)×10−6 and (2.8±1.5)×10−7, respectively, which agree with recent experimental results reported by the LHCb collaboration. In addition, we derive the relations B(B¯s0→p¯ΛK+)≃(fK/fπ)2(τBs0/τB0)B(B¯0→p¯Λπ+) and B(B¯s0→pΛ¯π−)/B(B¯s0→pΛ¯K−)≃B(B−→pp¯π−)/B(B−→pp¯K−) to be confronted to future experimental measurements. The fact that all four processes Bs0,B¯s0→pΛ¯K−,p¯ΛK+ can occur opens the possibility of decay-time-dependent CP violation measurements in baryonic B decays, something that had not been realized before.