Jet energy loss and high $p_T$ photon production in hot quark-gluon plasma

TL;DR

This paper investigates jet energy loss and high transverse momentum photon production in hot quark-gluon plasma at RHIC energies, using a comprehensive theoretical framework to match experimental data.

Contribution

It introduces a detailed calculation of jet quenching and photon production incorporating both gluon emission and elastic collisions within a hydrodynamical medium.

Findings

Good agreement with experimental data on photon yields

Demonstrates importance of jet-medium interactions for understanding jet quenching

Highlights photon-hadron correlation insights

Abstract

Jet-quenching and photon production at high transverse momentum are studied at RHIC energies, together with the correlation between jets and photons. The energy loss of hard partons traversing the hot QGP is evaluated in the AMY formalism, consistently taking into account both induced gluon emission and elastic collisions. The production of high $p_T$ photons in Au+Au collisions is calculated, incorporating a complete set of photon-production channels. Putting all these ingredients together with a (3+1)-dimensional ideal relativistic hydrodynamical description of the thermal medium, we achieve a good description of the current experimental data. Our results illustrate that the interaction between hard jets and the soft medium is important for a complete understanding of jet quenching, photon production, and photon-hadron correlations in relativistic nuclear collisions.