Flow Effects on Jet quenching with Detailed Balance

TL;DR

This paper models how collective flow in a medium influences jet quenching, showing that flow velocity reduces energy loss and impacts high-energy particle suppression in heavy-ion collisions.

Contribution

It introduces a new potential model incorporating collective flow effects into jet-medium interactions within pQCD framework.

Findings

Flow reduces jet energy loss proportionally to (1 - v_z).

Flow affects the suppression of high p_T hadrons.

Flow influences the anisotropy parameter v_2.

Abstract

A new model potential in the presence of collective flow describing the interaction of the hard jet with scattering centers is derived based on the static color-screened Yukawa potential. The flow effect on jet quenching with detailed balance is investigated in pQCD. It turns out that the collective flow changes the emission current and the LPM destructive interference comparing to that in the static medium. Considering the collective flow with velocity v_z along the jet direction, the energy loss is (1 - v_z) times that in the static medium to the first order of opacity. The flow dependence of the energy loss will affect the suppression of high p_T hadron spectrum and anisotropy parameter v_2 in high-energy heavy-ion collisions.