A QCD sum rule calculation for the Y(4140) narrow structure

Raphael M. Albuquerque, Mirian E. Bracco, Marina Nielsen

We use the QCD sum rules to evaluate the mass of a possible scalar mesonic state that couples to a molecular $D_s^{\ast }{\bar{D}}_s^{\ast }$ current. We find a mass $m_{D_s^*D_s^*}=(4.14\…