Exclusive ${\pi }^0$ production at EIC of China within handbag approach

Abstract

The exclusive ${\pi }^0$ electroproduction is analyzed within the handbag approach based on Generalized Parton Distributions (GPDs) factorization. We consider the leading-twist contribution together with the transversity effects. It is shown that the transversity, $H_T$ and ${\bar{E}}_T$ GPDs are essential in the description of ${\pi }^0$ cross section. Predictions for future Electron-Ion Collider of China (EicC) energy range are done. It is found that transversity dominance ${\sigma }_T\gg {\sigma }_L$, observed at low energies is valid up to EicC energy range.

Comments: 14 pages, 16 figures