Measurement of $π^{0}$ and $γ$ in d+Au collisions at $\sqrt{s_{NN}}=$ 200 GeV by PHENIX experiment

Details Measurement of $π^{0}$ and $γ$ in d+Au collisions at $\sqrt{s_{NN}}=$ 200 GeV by PHENIX experiment Measurement of $π^{0}$ and $γ$ in d+Au collisions at $\sqrt{s_{NN}}=$ 200 GeV by PHENIX experiment

2009-07-26

arxiv.org/abs/0907.4457v2

Nucl.Phys.A830:617c-618c,2009

Physics

Nuclear Physics

Nuclear Experiment

2 pages, 1 figure, Quark Matter 2009 conference proceedings (cosmetic changes following suggestions of reviewers)

Scientific paper

10.1016/j.nuclphysa.2009.10.110

Previous results indicated that high $p_T$ particle suppression in Au+Au interactions is a final state effect, since R$_{dA}$ ratios were compatible with unity, albeit within large experimental errors. It is important to test this conclusion to higher precision since the modification of structure functions may be involved. Recent d+Au data taken in 2008 improve the integrated luminosity by about a factor of thirty compared to the 2003 data. A more precise measurement of both $\pi^0$ and $\gamma$ at higher $p_T$ will shed new light on whether the initial state in the heavy nuclei is modified.

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