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Recent results on high pT identified hadrons in Au + Au collisions from the PHENIX experiment are presented. The RAA for π0 and η are found to be consistent. The second and fourth order collective flow of π0's have been measured and found that v4/v22 is consistent with the one observed in the lower pT region. Assuming the suppression of the π0 yield at highest pT arises from energy loss of partons,...
Weak bosons do not participate in the strong interaction, and thus constitute clean probes of the initial state of nucleus–nucleus collisions. The comparison of their production cross sections in pp and in nuclear collisions provides constraints on the nuclear parton distribution functions. Despite the low production cross section of weak bosons, compared to other nuclear processes, the relatively...
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