Recent and future experimental evidences for exotic mesons in hard reactions

Abstract

The QCD analysis of the recent experimental data (L3@LEP) of the hard exclusive $\rho \rho$ production in two photon collisions shows that these data can be understood as a signal for the existence of an exotic isotensor resonance with a mass around $1.5\mathrm{GeV}$. We also argue that hard exclusive reactions are a powerful tool for an experimental study of exotic hybrid mesons with $J^{PC}=1^{-+}$.

Talk given at XXXIII International Conference on High Energy Physics, July 26 - August 2, Moscow, Russia