Flow anisotropies due to momentum deposition from hard partons

TL;DR

This paper investigates how momentum deposition from hard partons influences flow anisotropies in quark-gluon plasma, emphasizing its significance for accurate modeling of nuclear collisions at the LHC.

Contribution

It introduces the impact of non-thermalized hard partons depositing energy and momentum into the quark-gluon fluid, affecting flow anisotropies at all orders.

Findings

Flow anisotropies are significantly affected by momentum deposition from hard partons.

This mechanism contributes to flow anisotropies at all orders.

Inclusion of this effect is essential for realistic collision simulations.

Abstract

In nuclear collisions at the LHC large number of hard partons are created in initial partonic interactions, so that it is reasonable to suppose that they do not thermalise immediately but deposit their energy and momentum later into the evolving hot quark-gluon fluid. We show that this mechanism leads to contribution to flow anisotropies at all orders which are non-negligible and should be taken into account in realistic simulations.