Speaker
Description
Momentum transfer distributions $d\sigma/dt$ in diffractive electroproduction of heavy quarkonia on nuclear targets are studied within a rigorous quantum-mechanical approach based on the light-front Green function formalism [1]. Such a formalism allows to include naturally the higher-twist and leading-twist shadowing corrections, as well as
the color transparency effects. Model calculations of $d\sigma/dt$, containing also the correlation between impact parameter of a collision and dipole orientation, are tested by the recent data on charmonium production in ultra-peripheral nuclear collisions. We present also predictions for the reduced quantum coherence effects in $d\sigma/dt$ that can be verified in kinematic regions scanned by experiments at the prepared electron-ion collider.
References:
[1] J. Nemchik, J. Obertova, Phys. Rev. D 110, 054015 (2024)
