$π^0$-h correlation in Cu+Cu at $\sqrt{s_{NN}}$=200 GeV

Details $π^0$-h correlation in Cu+Cu at $\sqrt{s_{NN}}$=200 GeV $π^0$-h correlation in Cu+Cu at $\sqrt{s_{NN}}$=200 GeV

2007-03-30

arxiv.org/abs/nucl-ex/0703047v2

Int.J.Mod.Phys.E16:2000-2004,2007

Physics

Nuclear Physics

Nuclear Experiment

5 pages, 4 figures, QM06 poster, Shanghai, China, Nov. 14-20, 2006

Scientific paper

10.1142/S0218301307007362

We present the results of the two-particle $\Delta\phi$ correlation between high $p_T$ $\pi^0$ and charged hadrons in Cu+Cu collisions at $\sqrt{s_{NN}} = 200$ GeV. Clear away-side jet signals are seen in central Cu+Cu collisions at all associated hadron $p_T$, albeit suppressed by factor of 2 above 2 GeV/$c$. This level is similar to the suppression seen for inclusive hadrons at high $p_T$ ($>7$ GeV/$c$). However, this agreement is argued to be the result of a cancellation between a flatter away-side parton spectra due to the requirement of high $p_T$ triggers and a bigger energy loss due to a longer path length traversed by the away-side jet.

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