V.Yu. Petrov (PNPI)

 

Exotic pentaquarks out of heavy quarks

 

Two possible mechanisms for exotic pentaquarks discovered by LHCb are discussed. They correspond to different distances between heavy quarks. First scenario is deuteron-like, pentaquark is loosely bound state of \Sigma_c-hyperon and anti-D meson. Second one considers pentaquark as a hadroquarkonium, i.e. the bound state of charmonium and ordinary hadron. Advantages and disadvantages of both scenario are discussed as well as possibility to distinguish them experimentally