Multiplicity and Pseudorapidity Distributions of Photons in Au+Au Collisions at {radical}(s{sub NN})=62.4 GeV

Journal Article · Fri Aug 05 04:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.062301· OSTI ID:20699281

Adams, J; Barnby, L S; Blyth, C O; Gaillard, L; Jones, P G; Nelson, J M ^[1]; Aggarwal, M M; Bhati, A K; Kumar, A; Sharma, M ^[2]; Ahammed, Z; Chattopadhyay, S; Das, D; Das, S; Mazumdar, M.R. Dutta; Ganti, M S; Ghosh, P; Mohanty, B; Nayak, T K; Netrakanti, P K ^[3]

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1. University of Birmingham, Birmingham (United Kingdom)
2. Panjab University, Chandigarh 160014 (India)
3. Variable Energy Cyclotron Centre, Kolkata 700064 (India); and others

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 {radical}(s{sub NN})=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}{sup 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.

• OSTI ID: 20699281
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COLLIDING BEAMS
GEV RANGE 10-100
GOLD 197 BEAMS
GOLD 197 REACTIONS
GOLD 197 TARGET
LIMITING FRAGMENTATION
MULTIPLICITY
NUCLEAR FRAGMENTATION
NUCLEON-NUCLEON INTERACTIONS
PARTICLE DECAY
PARTICLE PRODUCTION
PARTICLE RAPIDITY
PHOTONS
PIONS NEUTRAL