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Title: Direct Photons in Heavy-Ion Collisions

Abstract

A brief overview of direct-photon measurements in ultra-relativistic nucleus-nucleus collisions is given. The results for Pb+Pb collisions at {radical}(s{sub NN}) = 17.3 GeV and for Au+Au collisions at {radical}(s{sub NN}) = 200 GeV are compared to estimates of the direct-photon yield from hard scattering. Both results leave room for a significant thermal photon component. A description purely based on hard scattering processes, however, is not ruled out so far.

Authors:
 [1]
  1. University of Muenster, Institut fuer Kernphysik, Wilhelm-Klemm-Strasse 9, 48149 Muenster (Germany)
Publication Date:
OSTI Identifier:
21056870
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 892; Journal Issue: 1; Conference: QCHS7: 7. conference on quark confinement and the hadron spectrum, Ponta Delgada, Acores (Portugal), 2-7 Sep 2006; Other Information: DOI: 10.1063/1.2714431; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; GEV RANGE; GOLD 197 REACTIONS; GOLD 197 TARGET; LEAD 208 REACTIONS; LEAD 208 TARGET; NUCLEAR REACTION YIELD; PARTICLE PRODUCTION; PHOTONS; RELATIVISTIC RANGE

Citation Formats

Reygers, Klaus. Direct Photons in Heavy-Ion Collisions. United States: N. p., 2007. Web. doi:10.1063/1.2714431.
Reygers, Klaus. Direct Photons in Heavy-Ion Collisions. United States. doi:10.1063/1.2714431.
Reygers, Klaus. Tue . "Direct Photons in Heavy-Ion Collisions". United States. doi:10.1063/1.2714431.
@article{osti_21056870,
title = {Direct Photons in Heavy-Ion Collisions},
author = {Reygers, Klaus},
abstractNote = {A brief overview of direct-photon measurements in ultra-relativistic nucleus-nucleus collisions is given. The results for Pb+Pb collisions at {radical}(s{sub NN}) = 17.3 GeV and for Au+Au collisions at {radical}(s{sub NN}) = 200 GeV are compared to estimates of the direct-photon yield from hard scattering. Both results leave room for a significant thermal photon component. A description purely based on hard scattering processes, however, is not ruled out so far.},
doi = {10.1063/1.2714431},
journal = {AIP Conference Proceedings},
number = 1,
volume = 892,
place = {United States},
year = {Tue Feb 27 00:00:00 EST 2007},
month = {Tue Feb 27 00:00:00 EST 2007}
}
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