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Article
Correlated production of p and (p)over-bar in Au+Au collisions at root s(NN)=200 GeV
Physics Letters B
  • Andrew Adare, University of Colorado, Boulder
  • Sergey Belikov, Iowa State University
  • Paul Constantin, Iowa State University
  • Nathan C. Grau, Iowa State University
  • John C. Hill, Iowa State University
  • John G. Lajoie, Iowa State University
  • Alexandre Lebedev, Iowa State University
  • Craig Ogilvie, Iowa State University
  • H. Pei, Iowa State University
  • Jan Rak, Iowa State University
  • Marzia Rosati, Iowa State University
  • S. Skutnik, Iowa State University
  • Carla Vale, Iowa State University
  • et al.
  • PHENIX Collaboration, PHENIX Collaboration
Document Type
Article
Publication Version
Published Version
Publication Date
6-14-2007
DOI
10.1016/j.physletb.2007.04.029
Abstract

Correlations between p and (p) over bar at transverse momenta typical of enhanced baryon production in Au + Au collisions are reported. The PHENIX experiment has measured same and opposite sign baryon pairs in Au + Au collisions at root s(NN) = 200 GeV. Correlated production of p and p with the trigger particle from the range 2.5 < p(T) < 4.0 GeV/c and the associated particle with 1.8 < p(T) < 2.5 GeV/c is observed to be nearly independent of the centrality of the collisions. Same sign pairs show no correlation at any centrality. The conditional yield of mesons triggered by baryons (and anti-baryons) and mesons in the same p(T) range rises with increasing centrality, except for the most central collisions, where baryons show a significantly smaller number of associated mesons. These data are consistent with a picture in which hard scattered partons produce correlated p and (p) over bar in the p(T) region of the baryon excess.

Comments

This is an article from Nuclear Physics B 649 (2007): 359, doi:10.1016/j.physletb.2007.04.029. Posted with permission.

Creative Commons License
Creative Commons Attribution 4.0 International
Copyright Owner
Elsevier B.V.
Language
en
File Format
application/pdf
Citation Information
Andrew Adare, Sergey Belikov, Paul Constantin, Nathan C. Grau, et al.. "Correlated production of p and (p)over-bar in Au+Au collisions at root s(NN)=200 GeV" Physics Letters B Vol. 649 Iss. 5-6 (2007) p. 359 - 369
Available at: http://works.bepress.com/craig-ogilvie/240/