Details

Autor(en) / Beteiligte

• Adare, A.
• Awes, Terry C.
• Cianciolo, Vince
• Efremenko, Yuri V.
• Enokizono, Akitomo
• Read Jr, Kenneth F.
• Silvermyr, David O.
• Sorensen, Soren P.
• Stankus, Paul W.
• Zhang, Chun
• Young, Glenn R.
• Collaboration, Phenix

Titel

Direct photon production in d+Au collisions at √sNN=200 GeV

Ist Teil von

• Physical review. C, Nuclear physics, 2013-05, Vol.87 (5)

Ort / Verlag

United States

Erscheinungsjahr

2013

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• Direct photons have been measured in √sNN=200 GeV d+Au collisions at midrapidity. A wide pT range is covered by measurements of nearly real virtual photons (1<pT<6 GeV/c) and real photons (5<pT<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 pT range. This indicates that the large enhancement of direct photons observed in Au+Au collisions for 1.0<pT<2.5 GeV/c is attributable to a source other than the initial-state nuclear effects.