Show simple item record

dc.contributor.authorBaksay, László A
dc.contributor.authorBaksay, Gyöngyi
dc.contributor.authorDehmelt, Klaus
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorRembeczki, Szabolcs
dc.contributor.authorAdare, Andrew Marshall
dc.contributor.authorAfanasiev, Sergei V.
dc.contributor.authorAidala, Christine A.
dc.contributor.authorAjitanand, N. N.
dc.contributor.authorAkiba, Yasuyuki
dc.date.accessioned2015-04-06T19:52:25Z
dc.date.available2015-04-06T19:52:25Z
dc.date.issued2010-03-29
dc.identifier.citationAdare, A., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Al-Bataineh, H., . . . Zolin, L. (2010). Enhanced production of direct photons in Au+Au collisions at √sNN=200GeV and implications for the initial temperature. Physical Review Letters, 104(13).en_US
dc.identifier.urihttp://hdl.handle.net/11141/542
dc.description.abstractThe production of e+e- pairs for me+e -<0.3GeV/c2 and 1<pT<5GeV/c is measured in p+p and Au+Au collisions at √sNN=200GeV. An enhanced yield above hadronic sources is observed. Treating the excess as photon internal conversions, the invariant yield of direct photons is deduced. In central Au+Au collisions, the excess of the direct photon yield over p+p is exponential in transverse momentum, with an inverse slope T=221±19stat±19systMeV. Hydrodynamical models with initial temperatures ranging from Tinit∼300-600MeV at times of ∼0.6-0.15fm/c after the collision are in qualitative agreement with the data. Lattice QCD predicts a phase transition to quark gluon plasma at ∼170MeV.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is available in accordance with the publisher's policy. It may be subject to U.S. Copyright Law.en_US
dc.rights.urihttp://journals.aps.org/authors/transfer-of-copyright-agreementen_US
dc.titleEnhanced production of direct photons in Au+Au collisions at √sNN=200GeV and implications for the initial temperatureen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevLett.104.132301


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record