Abstract:

Two new resonances were discovered recently by LHCb in the bottom baryon decay. They are candidates for hidden-charm pentaquark states. I'll discuss various models for such charmonium-like pentaquarks, including a cluster structure of quarks, a loosely bound molecular state and a composite hadrocharmonium. We have investigated the pentaquark production in various bottom baryon decays and pointed out the promising channels which are useful for experimental searches for pentaquarks.