Correlation of high energy photons and charged particles in p+p and d+Au collisions at $\sqrt{s}=200$ GeV

Details Correlation of high energy photons and charged particles in p+p and d+Au collisions at $\sqrt{s}=200$ GeV Correlation of high energy photons and charged particles in p+p and d+Au collisions at $\sqrt{s}=200$ GeV

2004-03-11

arxiv.org/abs/nucl-ex/0403013v1

Physics

Nuclear Physics

Nuclear Experiment

4 pages.Presented in Quark Matter'2004 conference, poster session

Scientific paper

Azimuthal correlations between high energy photons from $\pi^0$ decay ($p_T^{\gamma} < 10.5$ GeV) and charged hadrons ($p_T^{hadron}$ above a threshold of 2, 3 or 4 GeV/c) have been measured in p+p and d+Au collisions at $\sqrt{s}=200$ GeV. Clear jet-like correlations are observed at $\Delta\phi=0$ and 180 degrees, with peak widths decreasing with increasing $p_T^{hadron}$. Jet $$ and $\sqrt{< k_T^2 >}$ in d+Au collisions are deduced from the distributions. {\it These results are presented in Quark Matter 2004 poster session.

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