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dc.contributor.authorAdare, Andrew Marshall
dc.contributor.authorAfanasiev, Sergei V.
dc.contributor.authorAidala, C.
dc.contributor.authorAjitanand, N. N.
dc.contributor.authorAkiba, Yasuyuki
dc.contributor.authorAl-Bataineh, H.
dc.contributor.authorAlexander, Jim P.
dc.contributor.authorBaksay, Gyöngyi
dc.contributor.authorBaksay, Laszlo
dc.contributor.authorHohlmann, Marcus
dc.date.accessioned2013-10-17T18:42:26Z
dc.date.available2013-10-17T18:42:26Z
dc.date.issued2013-03-28
dc.identifier.citationAdare, A., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Al-Bataineh, H., . . . Zolin, L. (2013). Neutral pion production with respect to centrality and reaction plane in Au+Au collisions at √sNN=200 GeV. Physical Review C - Nuclear Physics, 87(3)en_US
dc.identifier.urihttp://hdl.handle.net/11141/92
dc.description.abstractThe PHENIX experiment has measured the production of π0s in Au+Au collisions at √sNN = 200 GeV. The new data offer a fourfold increase in recorded luminosity, providing higher precision and a larger reach in transverse momentum, pT, to 20 GeV/c. The production ratio of η/π0 is 0.46±0.01(stat)±0.05(syst), constant with p T and collision centrality. The observed ratio is consistent with earlier measurements, as well as with the p+p and d+Au values. π0 are suppressed by a factor of 5, as in earlier findings. However, with the improved statistical precision a small but significant rise of the nuclear modification factor RAA vs pT, with a slope of 0.0106±0.00290. 0034 (Gev/c)-1, is discernible in central collisions. A phenomenological extraction of the average fractional parton energy loss shows a decrease with increasing pT. To study the path-length dependence of suppression, the π0 yield is measured at different angles with respect to the event plane; a strong azimuthal dependence of the π0 RAA is observed. The data are compared to theoretical models of parton energy loss as a function of the path length L in the medium. Models based on perturbative quantum chromodynamics are insufficient to describe the data, while a hybrid model utilizing pQCD for the hard interactions and anti-de-Sitter space/conformal field theory (AdS/CFT) for the soft interactions is consistent with the data.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://publish.aps.org/authors/transfer-of-copyright-agreementen_US
dc.titleNeutral pion production with respect to centrality and reaction plane in Au+Au collisions at √sNN=200 GeVen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevC.87.034911


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