Conformal anomaly as a source of soft photons in heavy ion collisions
High Energy Physics - Phenomenology
2015-06-05 v2 High Energy Physics - Theory
Nuclear Theory
Abstract
We introduce a novel photon production mechanism stemming from the conformal anomaly of QCDxQED and the existence of strong (electro)magnetic fields in heavy ion collisions. Using the hydrodynamical description of the bulk modes of QCD plasma, we show that this mechanism leads to the photon production yield that is comparable to the yield from conventional sources. This mechanism also provides a significant positive contribution to the azimuthal anisotropy of photons, , as well as to the radial "flow". We compare our results to the data from the PHENIX Collaboration.
Cite
@article{arxiv.1206.1334,
title = {Conformal anomaly as a source of soft photons in heavy ion collisions},
author = {Gokce Basar and Dmitri Kharzeev and Vladimir Skokov},
journal= {arXiv preprint arXiv:1206.1334},
year = {2015}
}
Comments
5 pages, 3 figures; version accepted to Phys. Rev. Lett