Jets in heavy ion collisions

Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions 2016

Nattrass, Christine^1

Physics Department, University of Tennessee, Knoxville

TN

37996, United States^1

关键词: Fundamental theory;    Heavy ion collision;    High-energy collisions;    Measurements of;    Nuclear matters;    Quark-gluon plasma;    Single particle;    Strong interaction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/832/1/012001/pdf
DOI  :  10.1088/1742-6596/832/1/012001

来源: IOP

【 摘 要 】

High energy collisions of heavy nuclei permit the study of nuclear matter at temperatures and energy densities so high that the fundamental theory for strong interactions, QCD, predicts a phase transition to a plasma of quarks and gluons. This matter, called a Quark Gluon Plasma (QGP), has been studied experimentally for the last decade and has been observed to be a strongly interacting liquid with a low viscosity. High energy partons created early in the collision interact with the QGP and provide unique probes of its properties. Hard partons fragment into collimated sprays of particles called jets and have been studied through measurements of single particles, correlations between particles, and measurements of fully reconstructed jets. These measurements demonstrate partonic energy loss in the QGP and constrain the QGP's properties. Measurements of the jet structure give insight into the mechanism of this energy loss. The information we have learned from studies of jets and challenges for the field will be reviewed.