May, 2013
Direct photon production in d+Au collisions at root s(NN)=200 GeV
PHYSICAL REVIEW C
- Volume
- 87
- Number
- 5
- First page
- 054907
- Last page
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevC.87.054907
- Publisher
- AMER PHYSICAL SOC
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.
- Link information
- ID information
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- DOI : 10.1103/PhysRevC.87.054907
- ISSN : 2469-9985
- eISSN : 2469-9993
- Web of Science ID : WOS:000319205700003