Exotic $1^{--}$ States in QCD Sum Rules

Raphael M. Albuquerque, Marina Nielsen, Romulo Rodrigues da Silva

Using the QCD sum rules we test if the charmonium-like structure Y(4260), observed in the $J/\psi \pi \pi$ invariant mass spectrum, can be described with a $J/\psi f_0(980)$ molecular current w…