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dc.contributor.authorAdare, Andrew Marshall
dc.contributor.authorAfanasiev, Sergey V.
dc.contributor.authorAidala, Christine A.
dc.contributor.authorAjitanand, N. N.
dc.contributor.authorAkiba, Yasuyuki
dc.contributor.authorBaksay, Gyöngyi
dc.contributor.authorBaksay, László A.
dc.contributor.authorDehmelt, Klaus
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorRembeczki, S.
dc.date.accessioned2017-06-14T17:31:06Z
dc.date.available2017-06-14T17:31:06Z
dc.date.issued2009-08-31
dc.identifier.citationAdare, A., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Al-Bataineh, H., . . . Zolin, L. (2009). Photon-hadron jet correlations in p+p and Au+Au collisions at sNN=200 GeV. Physical Review C - Nuclear Physics, 80(2) doi:10.1103/PhysRevC.80.024908en_US
dc.identifier.urihttp://hdl.handle.net/11141/1576
dc.description.abstractWe report the observation at the Relativistic Heavy Ion Collider of suppression of back-to-back correlations in the direct photon+jet channel in Au+Au relative to p+p collisions. Two-particle correlations of direct photon triggers with associated hadrons are obtained by statistical subtraction of the decay photon-hadron (γ-h) background. The initial momentum of the away-side parton is tightly constrained, because the parton-photon pair exactly balance in momentum at leading order in perturbative quantum chromodynamics, making such correlations a powerful probe of the in-medium parton energy loss. The away-side nuclear suppression factor, IAA, in central Au+Au collisions, is 0.32±0.12stat±0.09syst for hadrons of 3<pTh<5 in coincidence with photons of 5<pTγ<15 GeV/c. The suppression is comparable to that observed for high-pT single hadrons and dihadrons. The direct photon associated yields in p+p collisions scale approximately with the momentum balance, zT pTh/pTγ, as expected for a measurement of the away-side parton fragmentation function. We compare to Au+Au collisions for which the momentum balance dependence of the nuclear modification should be sensitive to the path-length dependence of parton energy loss.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is made available in accordance with publishers policy. It may be subject to U.S. copyright law.en_US
dc.rights.urihttps://journals.aps.org/info/terms.htmlen_US
dc.titlePhoton-hadron jet correlations in p+p and Au+Au collisions at √sNN = 200 GeVen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevC.80.024908


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