Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

5-17-2013

Journal or Book Title

Physical Review C

Volume

87

Issue

5

First Page

054907

DOI

10.1103/PhysRevC.87.054907

Abstract

Direct photons have been measured in root s(NN) = 200 GeV d + Au collisions at midrapidity. A wide p(T) range is covered by measurements of nearly real virtual photons (1 < p(T) < 6 GeV/c) and real photons (5 < p(T) < 16 GeV/c). The invariant yield of the direct photons in d + Au collisions over the scaled p + p cross section is consistent with unity. Theoretical calculations assuming standard cold-nuclear-matter effects describe the data well for the entire p(T) range. This indicates that the large enhancement of direct photons observed in Au + Au collisions for 1.0 < p(T) < 2.5 GeV/c is attributable to a source other than the initial-state nuclear effects.

Comments

This is an article from Physical Review C 87 (2013): 054907-1, doi:10.1103/PhysRevC.87.054907. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

Included in

Nuclear Commons

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