Speaker
Boris Kopeliovich
(UTFSM)
Description
Coherence leads to $p_T$ broadening of partons in high-multiplicity events, which is a manifestation of the effect of parton saturation. Appearance of the saturation scale generates via DGLAP evolution an enhancement of low-x gluons. Mutual enhancement of low-x gluons in both colliding hadrons (pp, AA) results in an even stronger boost of the saturation scales. This explains the observed steep rise of the $J/\psi$ production rate vs hadron multiplicity in pp collisions.
Primary author
Boris Kopeliovich
(UTFSM)
