Jet quenching phenomenology from soft-collinear effective theory with Glauber gluons

TL;DR

This paper applies soft-collinear effective theory with Glauber gluons to describe jet quenching in heavy-ion collisions, unifying vacuum and medium-induced parton showers, and constraining jet-medium coupling with high precision.

Contribution

It introduces a novel effective theory approach (SCETG) to jet quenching, enabling more accurate modeling of jet-medium interactions beyond traditional energy loss methods.

Findings

Unified treatment of vacuum and medium-induced showers.

Quantified uncertainties in hadron suppression predictions.

Constrained jet-medium coupling with less than 10% uncertainty.

Abstract

We present the first application of a recently-developed effective theory of jet propagation in matter SCETG to inclusive hadron suppression in nucleus-nucleus collisions at the LHC. SCETG-based splitting kernels allow us to go beyond the traditional energy loss approximation and unify the treatment of vacuum and medium-induced parton showers. In the soft gluon emission limit, we establish a simple analytic relation between the QCD evolution and energy loss approaches to jet quenching. We quantify the uncertainties associated with the implementation of the in-medim modification of hadron production cross sections and show that the coupling between the jet and the medium can be constrained with better than 10% accuracy.