Updated analysis of jet quenching at RHIC and LHC within the light cone path integral approach

TL;DR

This paper analyzes jet quenching phenomena at RHIC and LHC using a light-cone path integral approach, showing reasonable agreement with experimental data and indicating weak sensitivity to QGP evolution stages.

Contribution

It applies a light-cone path integral model with a frozen running coupling to analyze jet quenching data across multiple collision energies, providing insights into QGP properties.

Findings

Theoretical predictions align with experimental $R_{AA}$ and $v_2$ data.

Larger $ ext{alpha}_s^{fr}$ values are supported by RHIC data.

Jet quenching shows weak dependence on QGP formation and decay times.

Abstract

We present results of a detailed analysis of experimental data on the nuclear modification factor $R_{AA}$ and the flow coefficient $v_2$ for light hadrons from RHIC for $0.2$ TeV Au+Au collisions and from LHC for $2.76$ and $5.02$ TeV Pb+Pb, and $5.44$ TeV Xe+Xe collisions. We perform calculations within the light-cone path integral approach to induced gluon emission. We use running $\alpha_s$ which is frozen at low momenta at some value $\alpha_{s}^{fr}$. We find that the RHIC data support somewhat larger value of $\alpha_{s}^{fr}$. For the $\chi^2$ optimized values of $\alpha_{s}^{fr}$, the theoretical predictions are in reasonable agreement with data on $R_{AA}$ and $v_2$. Calculations made for different formation times and life-times of the QGP show that jet quenching at the RHIC and LHC energies is only weakly sensitive to the initial and final stages of the QCD matter evolution.