Direct Photons in Heavy-Ion Collisions

Journal Article · Tue Feb 27 00:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2714431· OSTI ID:21056870

Reygers, Klaus ^[1]

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1. University of Muenster, Institut fuer Kernphysik, Wilhelm-Klemm-Strasse 9, 48149 Muenster (Germany)

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.

• OSTI ID: 21056870
• Journal Information: AIP Conference Proceedings, Vol. 892, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

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