Photons from jet - plasma interaction in relativistic heavy ion collisions

TL;DR

This paper investigates how collisional energy loss affects high transverse momentum photon production in relativistic heavy ion collisions, using a dynamic jet-plasma interaction model and providing predictions for LHC energies.

Contribution

It introduces a dynamic evolution model of jet phase space via Fokker-Planck equations to better understand photon yields in heavy ion collisions.

Findings

Photon data is well reproduced when all sources are included.

The model predicts photon yields at LHC energies.

Collisional energy loss significantly influences high pT photon production.

Abstract

We expose the role of collisional energy loss on high $p_T$ photon data measured by PHENIX collaboration by calculating photon yield in jet plasma interaction. The phase space distribution of the participating jet is dynamically evolved by solving Fokker-Planck equation. It is shown that the data is reasonably well reproduced when contributions from all the relevant sources are taken into account. Predictions at higher beam energies relevant for LHC experiment have been made.