$\pi \eta$ pair hard electroproduction and exotic hybrid mesons

Abstract

We show that hard electroproduction is a promising way to study exotic hybrid mesons, in particular through the hybrid decay channel $H\to \pi \eta$. We discuss the $\pi \eta$ generalized distribution amplitude, calculate the production amplitude and propose a forward-backward asymmetry as a signal for the hybrid meson production.

Comments: 4 pages, 1 figure, presented by I.V. Anikin at Xth International Conference "BARYONS'04", Palaiseau, France