2011/09/01 by Entem, D. R., Ortega, P. G., Fernandez, F.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)
paper · doi:10.48550/arxiv.1109.0311
We study the influence of possible molecular structures in the charmonium spectrum. We focus on the 0++ and 1-- sectors. In the first one we coupled the 2 3P0 q q pair with DD, J/ψω, DsDs and J/ψϕ channels and we obtain two states compatibles with the X(3945) and the Y(3940). In the second one we include the 33S1 and 23D1 charmonium states coupled to DD, DD^*, D^*D^*, DsDs, DsDs^* and Ds^*Ds^*. In this calculation we obtain a new molecular state that could be the G(3900) or the controversial Y(4008) and two c c states dressed by the molecular components assigned to the ψ(4040) and the ψ(4160). The two c c states show interesting properties and in particular they solve the strong disagreement of the decay branching ratios measured by BABAR.