2016/11/25 by F. Fernández, Fernández, F., D. R. Entem +5
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Black Holes and Theoretical Physics
paper · pdf · doi:10.48550/arxiv.1611.08533
The original charmonium two-body problem, like the c c structure of the J/ψ meson, has become more involved in the last few years with the discovery of new resonances such as the tentative molecular state X(3872) or the possible pentaquark one Pc(4380)+. We discuss herein how these exotic states (and others) can be described in a unified way adding higher Fock state components to the naive quark model picture. In particular, we present our theoretical results on the pentaquark states Pc(4380)+ and Pc(4450)+, and on the new charmonium-like resonances X(4140), X(4274), X(4500) and X(4700) that have been reported in 2016 by the LHCb Collaboration.