System size and energy dependence of jet-induced hadron pair correlation shapes in Cu+Cu and Au+Au collisions at root S-NN 200 and 62.4 GeV

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2007-06-01
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Adare, Andrew
Belikov, Sergey
Constantin, Paul
Grau, Nathan
Hill, John
Lajoie, John
Lebedev, Alexandre
Pei, H.
Rak, Jan
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Ogilvie, Craig
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Physics and Astronomy
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We present azimuthal angle correlations of intermediate transverse momentum (1-4 GeV/c) hadrons from dijets in Cu+Cu and Au+Au collisions at root s(NN)=62.4 and 200 GeV. The away-side dijet induced azimuthal correlation is broadened, non-Gaussian, and peaked away from Delta phi=pi in central and semicentral collisions in all the systems. The broadening and peak location are found to depend upon the number of participants in the collision, but not on the collision energy or beam nuclei. These results are consistent with sound or shock wave models, but pose challenges to Cherenkov gluon radiation models.

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This article is published as Adare, A., S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh et al. "System Size and Energy Dependence of Jet-Induced Hadron Pair Correlation Shapes in Cu+ Cu and Au+ Au Collisions at s N N= 200 and 62.4 GeV." Physical review letters 98, no. 23 (2007): 232302. DOI: 10.1103/PhysRevLett.98.232302. Posted with permission.

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Mon Jan 01 00:00:00 UTC 2007
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