Article
Onset of pi(0) Suppression Studied in Cu plus Cu Collisions at root s(NN)=22.4, 62.4, and 200 GeV
Physical Review Letters
Document Type
Article
Disciplines
Publication Version
Published Version
Publication Date
10-1-2008
DOI
10.1103/PhysRevLett.101.162301
Abstract
Neutral pion transverse momentum (p(T)) spectra at midrapidity (|y| less than or similar to 0.35) were measured in Cu + Cu collisions at root s(NN) = 22.4, 62.4, and 200 GeV. Relative to pi(0) yields in p + p collisions scaled by the number of inelastic nucleon-nucleon collisions (N-coll) the pi(0) yields for p(T) greater than or similar to 2 GeV/c in central Cu + Cu collisions are suppressed at 62.4 and 200 GeV whereas an enhancement is observed at 22.4 GeV. A comparison with a jet-quenching model suggests that final state parton energy loss dominates in central Cu + Cu collisions at 62.4 and 200 GeV, while the enhancement at 22.4 GeV is consistent with nuclear modifications in the initial state alone.
Copyright Owner
American Physical Society
Copyright Date
2008
Language
en
File Format
application/pdf
Citation Information
Andrew Adare, Nathan C. Grau, John C. Hill, Todd Kempel, et al.. "Onset of pi(0) Suppression Studied in Cu plus Cu Collisions at root s(NN)=22.4, 62.4, and 200 GeV" Physical Review Letters Vol. 101 Iss. 16 (2008) p. 162301 Available at: http://works.bepress.com/craig-ogilvie/201/
This article is published as Adare, A., S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander et al. "Onset of π 0 Suppression Studied in Cu+ Cu Collisions at s N N= 22.4, 62.4, and 200 GeV." Physical review letters 101, no. 16 (2008): 162301. DOI:10.1103/PhysRevLett.101.162301. Posted with permission.