Flavor and path-length dependence of jet quenching from inclusive jet and {\gamma}-jet suppression

TL;DR

This paper analyzes jet suppression in heavy-ion collisions, quantifying energy loss and its dependence on path length, flavor, and fluctuations, providing insights into the radiative energy loss mechanism and predictions for future experiments.

Contribution

It introduces a parametric approach to quantify jet energy loss and its path-length dependence, incorporating fluctuations and nuclear PDFs, with model-independent predictions for upcoming collision systems.

Findings

Energy loss magnitude and pT dependence quantified

Path-length dependence supports radiative energy loss physics

Predictions for jet suppression in oxygen-oxygen collisions

Abstract

We employ the parametric approach to analyze jet suppression measured using the nuclear modification factor of inclusive jets, $b$-jets, and jets from $\gamma$-jet events. With minimum model assumptions, we quantify the magnitude of the average energy loss and its transverse momentum dependence. Then, we quantify the impact of fluctuations in the energy loss and nuclear PDFs on the measured jet suppression. The Glauber and Trajectum models are used to estimate the average path length that a jet is expected to traverse in the medium. With this information, we quantify the path-length dependence of the average energy loss, which is found to support the physics picture of the radiative nature of parton energy loss. Using the obtained parameterizations, we evaluate jet $v_2$, quantifying its sensitivity to details of path-length modeling. We also provide model-independent predictions for the magnitude of energy loss expected in upcoming oxygen-oxygen collisions and briefly discuss the path-length dependence of energy loss of $b$-jets. Finally, we analyze intriguing features seen in the suppression of jets in the $\gamma$-jet system.