Hard exclusive production of two pions

The leading twist parametrization of dipion mass distribution in hard exclusive reactions is proposed. The parameters of this parametrization are related to quark distributions (usual and skewed) in the pion and to distribution amplitudes of mesons (π,ϱ, etc.). We show that measurements of the shape of dipion mass distribution in hard exclusive reactions can give important information about partonic structure of the pion. The expression for the amplitude of the reaction γ∗γ → ππ near the threshold in terms of singlet quark distribution in the pion is presented.