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Title: Charged-particle multiplicity and pseudorapidity distributions measured with the PHOBOS detector in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultrarelativistic energies

Abstract

Pseudorapidity distributions of charged particles emitted in Au+Au, Cu+Cu, d+Au, and p+p collisions over a wide energy range have been measured using the PHOBOS detector at the BNL Relativistic Heavy-Ion Collider (RHIC). The centrality dependence of both the charged particle distributions and the multiplicity at midrapidity were measured. Pseudorapidity distributions of charged particles emitted with |{eta}|<5.4, which account for between 95% and 99% of the total charged-particle emission associated with collision participants, are presented for different collision centralities. Both the midrapidity density dN{sub ch}/d{eta} and the total charged-particle multiplicity N{sub ch} are found to factorize into a product of independent functions of collision energy, {radical}(s{sub N{sub N}}), and centrality given in terms of the number of nucleons participating in the collision, N{sub part}. The total charged particle multiplicity, observed in these experiments and those at lower energies, assumes a linear dependence of (lns{sub N{sub N}}){sup 2} over the full range of collision energy of {radical}(s{sub N{sub N}})=2.7-200 GeV.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1]
  1. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
21499437
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 83; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.83.024913; (c) 2011 American Institute of Physics; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ATOM-ATOM COLLISIONS; BNL; BROOKHAVEN RHIC; CHARGED PARTICLES; COLLISIONS; COPPER; DENSITY; DISTRIBUTION; EMISSION; GEV RANGE; GOLD; MULTIPLICITY; NUCLEONS; PARTICLE RAPIDITY; PROTON-PROTON INTERACTIONS; RELATIVISTIC RANGE; ACCELERATORS; ATOM COLLISIONS; BARYON-BARYON INTERACTIONS; BARYONS; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; FERMIONS; HADRON-HADRON INTERACTIONS; HADRONS; HEAVY ION ACCELERATORS; INTERACTIONS; METALS; NATIONAL ORGANIZATIONS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; PROTON-NUCLEON INTERACTIONS; STORAGE RINGS; TRANSITION ELEMENTS; US AEC; US DOE; US ERDA; US ORGANIZATIONS

Citation Formats

Alver, B, Ballintijn, M, Busza, W, Decowski, M P, Gulbrandsen, K, Henderson, C, Kane, J L, Katzy, J, Kulinich, P, Li, W, Loizides, C, Pernegger, H, Reed, C, Roland, C, Roland, G, Rosenberg, L, Sarin, P, Steadman, S G, Stephans, G S. F., and Vale, C. Charged-particle multiplicity and pseudorapidity distributions measured with the PHOBOS detector in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultrarelativistic energies. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.83.024913.
Alver, B, Ballintijn, M, Busza, W, Decowski, M P, Gulbrandsen, K, Henderson, C, Kane, J L, Katzy, J, Kulinich, P, Li, W, Loizides, C, Pernegger, H, Reed, C, Roland, C, Roland, G, Rosenberg, L, Sarin, P, Steadman, S G, Stephans, G S. F., & Vale, C. Charged-particle multiplicity and pseudorapidity distributions measured with the PHOBOS detector in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultrarelativistic energies. United States. https://doi.org/10.1103/PHYSREVC.83.024913
Alver, B, Ballintijn, M, Busza, W, Decowski, M P, Gulbrandsen, K, Henderson, C, Kane, J L, Katzy, J, Kulinich, P, Li, W, Loizides, C, Pernegger, H, Reed, C, Roland, C, Roland, G, Rosenberg, L, Sarin, P, Steadman, S G, Stephans, G S. F., and Vale, C. 2011. "Charged-particle multiplicity and pseudorapidity distributions measured with the PHOBOS detector in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultrarelativistic energies". United States. https://doi.org/10.1103/PHYSREVC.83.024913.
@article{osti_21499437,
title = {Charged-particle multiplicity and pseudorapidity distributions measured with the PHOBOS detector in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultrarelativistic energies},
author = {Alver, B and Ballintijn, M and Busza, W and Decowski, M P and Gulbrandsen, K and Henderson, C and Kane, J L and Katzy, J and Kulinich, P and Li, W and Loizides, C and Pernegger, H and Reed, C and Roland, C and Roland, G and Rosenberg, L and Sarin, P and Steadman, S G and Stephans, G S. F. and Vale, C},
abstractNote = {Pseudorapidity distributions of charged particles emitted in Au+Au, Cu+Cu, d+Au, and p+p collisions over a wide energy range have been measured using the PHOBOS detector at the BNL Relativistic Heavy-Ion Collider (RHIC). The centrality dependence of both the charged particle distributions and the multiplicity at midrapidity were measured. Pseudorapidity distributions of charged particles emitted with |{eta}|<5.4, which account for between 95% and 99% of the total charged-particle emission associated with collision participants, are presented for different collision centralities. Both the midrapidity density dN{sub ch}/d{eta} and the total charged-particle multiplicity N{sub ch} are found to factorize into a product of independent functions of collision energy, {radical}(s{sub N{sub N}}), and centrality given in terms of the number of nucleons participating in the collision, N{sub part}. The total charged particle multiplicity, observed in these experiments and those at lower energies, assumes a linear dependence of (lns{sub N{sub N}}){sup 2} over the full range of collision energy of {radical}(s{sub N{sub N}})=2.7-200 GeV.},
doi = {10.1103/PHYSREVC.83.024913},
url = {https://www.osti.gov/biblio/21499437}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 2,
volume = 83,
place = {United States},
year = {Tue Feb 15 00:00:00 EST 2011},
month = {Tue Feb 15 00:00:00 EST 2011}
}