Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

6-14-2007

Journal or Book Title

Physics Letters B

Volume

649

Issue

5-6

First Page

359

Last Page

369

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 License
This work is licensed under a Creative Commons Attribution 4.0 License.

Copyright Owner

Elsevier B.V.

Language

en

File Format

application/pdf

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