Overview on jet results from STAR

TL;DR

This paper reviews the STAR experiment's results on full jet reconstruction in heavy-ion collisions, demonstrating jets as calibrated probes and analyzing energy loss mechanisms through various measurements in p+p and Au+Au collisions.

Contribution

It provides a comprehensive overview of jet measurements in heavy-ion collisions, including calibration, cross sections, and fragmentation functions, advancing understanding of jet quenching.

Findings

Jets are confirmed as calibrated pQCD probes.

Differential jet cross sections in Au+Au are compared to p+p.

Fragmentation functions show modifications in heavy-ion environments.

Abstract

Full jet reconstruction allows access to the parton kinematics over a large energy domain and can be used to constrain the mechanisms of energy loss in heavy-ion collisions. Such measurements are challenging at RHIC, due to the high-multiplicity environments created in heavy-ion collisions. In these proceedings, we report an overview of the results on full jet reconstruction obtained by the STAR experiment. Jet measurements in 200 GeV p+p show that jets are calibrated pQCD probes and provide a baseline for jet measurements in Au+Au collisions. Inclusive differential jet production cross sections and ratios are reported for central 200 GeV Au+Au collisions and compared to p+p. We also present measurements of fully reconstructed di-jets at mid-rapidity, and compare spectra and fragmentation functions in p+p and central Au+Au collisions.