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Title: Multiplicity and pseudorapidity distributions of charged particles and photons at forward pseudorapidity in Au+Au collisons at {radical}(s{sub NN})=62.4 GeV

Abstract

We present the centrality-dependent measurement of multiplicity and pseudorapidity distributions of charged particles and photons in Au+Au collisions at {radical}(s{sub NN})=62.4 GeV. The charged particles and photons are measured in the pseudorapidity region 2.9{<=}{eta}{<=}3.9 and 2.3{<=}{eta}{<=}3.7, respectively. We have studied the scaling of particle production with the number of participating nucleons and the number of binary collisions. The photon and charged particle production in the measured pseudorapidity range has been shown to be consistent with energy-independent limiting fragmentation behavior. Photons are observed to follow a centrality-independent limiting fragmentation behavior, while for charged particles it is centrality dependent. We have carried out a comparative study of the pseudorapidity distributions of positively charged hadrons, negatively charged hadrons, photons, pions, and net protons in nucleus-nucleus collisions and pseudorapidity distributions from p+p collisions. From these comparisons, we conclude that baryons in the inclusive charged particle distribution are responsible for the observed centrality dependence of limiting fragmentation. The mesons are found to follow an energy-independent behavior of limiting fragmentation, whereas the behavior of baryons is energy dependent.

Authors:
; ; ; ; ; ;  [1]; ; ; ;  [2]; ; ; ; ; ; ; ; ;  [3]
  1. University of Birmingham, Birmingham (United Kingdom)
  2. Panjab University, Chandigarh 160014 (India)
  3. Variable Energy Cyclotron Centre, Kolkata 700064 (India) (and others)
Publication Date:
OSTI Identifier:
20771367
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.73.034906; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CHARGED PARTICLES; COMPARATIVE EVALUATIONS; DISTRIBUTION; ENERGY DEPENDENCE; GEV RANGE; GOLD 197 REACTIONS; GOLD 197 TARGET; LIMITING FRAGMENTATION; MULTIPLICITY; PARTICLE PRODUCTION; PARTICLE RAPIDITY; PHOTONS; PIONS; PROTONS

Citation Formats

Adams, J., Barnby, L.S., Blyth, C.O., Gaillard, L., Jones, P.G., Nelson, J.M., Timmins, A.R., Aggarwal, M.M., Bhati, A.K., Kumar, A., Sharma, M., Ahammed, Z., Chattopadhyay, S., Das, D., Das, S., Majumdar, M.R. Dutta, Ganti, M.S., Ghosh, P., Mohanty, B., and Nayak, T.K.. Multiplicity and pseudorapidity distributions of charged particles and photons at forward pseudorapidity in Au+Au collisons at {radical}(s{sub NN})=62.4 GeV. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.034906.
Adams, J., Barnby, L.S., Blyth, C.O., Gaillard, L., Jones, P.G., Nelson, J.M., Timmins, A.R., Aggarwal, M.M., Bhati, A.K., Kumar, A., Sharma, M., Ahammed, Z., Chattopadhyay, S., Das, D., Das, S., Majumdar, M.R. Dutta, Ganti, M.S., Ghosh, P., Mohanty, B., & Nayak, T.K.. Multiplicity and pseudorapidity distributions of charged particles and photons at forward pseudorapidity in Au+Au collisons at {radical}(s{sub NN})=62.4 GeV. United States. doi:10.1103/PhysRevC.73.034906.
Adams, J., Barnby, L.S., Blyth, C.O., Gaillard, L., Jones, P.G., Nelson, J.M., Timmins, A.R., Aggarwal, M.M., Bhati, A.K., Kumar, A., Sharma, M., Ahammed, Z., Chattopadhyay, S., Das, D., Das, S., Majumdar, M.R. Dutta, Ganti, M.S., Ghosh, P., Mohanty, B., and Nayak, T.K.. Wed . "Multiplicity and pseudorapidity distributions of charged particles and photons at forward pseudorapidity in Au+Au collisons at {radical}(s{sub NN})=62.4 GeV". United States. doi:10.1103/PhysRevC.73.034906.
@article{osti_20771367,
title = {Multiplicity and pseudorapidity distributions of charged particles and photons at forward pseudorapidity in Au+Au collisons at {radical}(s{sub NN})=62.4 GeV},
author = {Adams, J. and Barnby, L.S. and Blyth, C.O. and Gaillard, L. and Jones, P.G. and Nelson, J.M. and Timmins, A.R. and Aggarwal, M.M. and Bhati, A.K. and Kumar, A. and Sharma, M. and Ahammed, Z. and Chattopadhyay, S. and Das, D. and Das, S. and Majumdar, M.R. Dutta and Ganti, M.S. and Ghosh, P. and Mohanty, B. and Nayak, T.K.},
abstractNote = {We present the centrality-dependent measurement of multiplicity and pseudorapidity distributions of charged particles and photons in Au+Au collisions at {radical}(s{sub NN})=62.4 GeV. The charged particles and photons are measured in the pseudorapidity region 2.9{<=}{eta}{<=}3.9 and 2.3{<=}{eta}{<=}3.7, respectively. We have studied the scaling of particle production with the number of participating nucleons and the number of binary collisions. The photon and charged particle production in the measured pseudorapidity range has been shown to be consistent with energy-independent limiting fragmentation behavior. Photons are observed to follow a centrality-independent limiting fragmentation behavior, while for charged particles it is centrality dependent. We have carried out a comparative study of the pseudorapidity distributions of positively charged hadrons, negatively charged hadrons, photons, pions, and net protons in nucleus-nucleus collisions and pseudorapidity distributions from p+p collisions. From these comparisons, we conclude that baryons in the inclusive charged particle distribution are responsible for the observed centrality dependence of limiting fragmentation. The mesons are found to follow an energy-independent behavior of limiting fragmentation, whereas the behavior of baryons is energy dependent.},
doi = {10.1103/PhysRevC.73.034906},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}