XXII RETINHA

A study of the Y(4140) and Y(3930) resonances using the QCD sum rules

Not scheduled

1m

Auditório (IFT-UNESP)

Speaker

Mr Stefano Finazzo (Universidade de São Paulo)

Description

Previous studies of the Y(4140) and Y(3930) resonances as the molecular partners $D_s* D_s*$ and $D*D*$, resp., with $J^{PC}= 0^{++}$, using the QCD sum rules, lead to diverging results for the mass of the $D*D*$ state as condensates of higher dimension are included and also to the curious result that the masses obtained for the $D_s* D_s*$ and $D*D*$ states are very close. In this work we study the effect of the inclusion of the dimension 10 condensates into the sum rules for the $D_s* D_s*$ and $D*D*$ states, with the goal of evaluating if the OPE convergence is achieved at this dimension and of studying the effect of these contributions on the mass of the $D_s* D_s*$ and $D*D*$ molecular states.