Influence of jets and resonance decays on the constituent quark scaling of elliptic flow

TL;DR

This paper uses the HYDJET++ model to study how jets and resonance decays affect elliptic flow and the NCQ scaling in heavy-ion collisions at RHIC and LHC energies, revealing that jets suppress flow scaling and resonance decays enhance low-p_T flow.

Contribution

It demonstrates the impact of jets and resonance decays on elliptic flow and NCQ scaling, providing insights into soft-hard process interplay in heavy-ion collisions.

Findings

Jets suppress hydro-like elliptic flow increase at high p_T.

Jets have a stronger influence at LHC than at RHIC.

Resonance decays enhance low-p_T elliptic flow and support NCQ scaling.

Abstract

The Monte Carlo HYDJET++ model, that contains both hydrodynamic state and jets, is applied to study the influence of the interplay between soft and hard processes on the formation of the elliptic flow in heavy-ion collisions at RHIC and LHC energies. Jets are found to cease the hydro-like increase of the elliptic flow with rising p_T. Since jets are more influential at LHC than at RHIC, the v_2 at LHC should be weaker than that at RHIC. Violation of the number-of-constituent-quark (NCQ) scaling is predicted. The decays of resonances are found to enhance the low-p_T part of the elliptic flow of pions and light baryons, and work toward the fulfillment of the NCQ scaling.