Hard Probes: After the dust has settled!

TL;DR

This paper reviews the progress in understanding jet modification in quark-gluon plasma over 15 years, emphasizing theoretical advances, higher order calculations, and the challenges in modeling and interpreting jet quenching data.

Contribution

It highlights the development of higher order calculations and the connection of jet transport coefficients with the properties of the QGP, aiming for precision in future measurements.

Findings

Emerging higher order calculations of jet transport coefficients

Development of ingredients for NLO jet modification calculations

Insights into the transition of energy from jet to medium

Abstract

A lot has been learnt in the 15 years since the first data on jet modification at the Relativistic Heavy Ion Collider (RHIC). These proceedings will describe the portion of the theory that is unassailable, and attempt to chart a course for the next period of precision measurements and related calculations. In particular, we will focus on the emerging series of higher order calculations, which may reveal the scale, energy and temperature dependence of jet transport coefficients, as well as develop ingredients for a future NLO calculation of jet modification. Connections with the underlying degrees of freedom in the Quark Gluon Plasma (QGP) will be explored. We will discuss the challenges faced by Monte-Carlo event generators and their comparison with a broad spectrum of jet modification data. First principles calculations of transport coefficients, and the determination of new transport coefficients which encapsulate the transition of energy momentum from the jet scale to the medium scale will also be discussed.