Multiplicity and pseudorapidity distributions of photons in Au+Au collisions at root s(NN)=62.4 GeV

0308768 - ÚJF 2008 RIV US eng J - Journal Article
Adams, J. - Bysterský, Michal - Chaloupka, Petr - Lednický, Richard - Šumbera, Michal - Zborovský, Imrich
Multiplicity and pseudorapidity distributions of photons in Au+Au collisions at root s(NN)=62.4 GeV.
[Rozdělení multiplicity a pseudorapidity fotonů ve srážkách Au+Au při root s(NN)=62.4 GeV.]
Physical Review Letters. Roč. 95, č. 6 (2005), 062301-1-062301-6. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA ČR GA202/04/0793
Institutional research plan: CEZ:AV0Z10480505; CEZ:AV0Z10100502
Keywords : multiplicity * pseudorapidity * Au+Au collision
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 7.489, year: 2005

We present the first measurement of pseudorapidity distribution of photons in the region 2.3 <= eta <= 3.7 for different centralities in Au+Au collisions at root sNN = 62.4 GeV. We find that the photon yield scales with the number of participating nucleons at all collision centralities studied. The pseudorapidity distribution of photons, dominated by pi(0) decays, has been compared to those of charged pions, photons, and inclusive charged particles from heavy-ion and nucleon-nucleon collisions at various energies. The photon production has been shown to be consistent with the energy and centrality independent limiting fragmentation scenario.

Rozdělení multiplicity a pseudorapidity fotonů ve srážkách Au+Au při root s(NN)=62.4 GeV.
Permanent Link: http://hdl.handle.net/11104/0161141