High transverse momentum triggered correlations over a large pseudorapidity acceptance in Au+Au collisions at sqrt(s_NN)=200 GeV
Name
Alver-2010-High transverse momentum triggered correlations over a large pseudorapidity Acceptance in Au+Au Collisions at sNN.pdf
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385.22 KB
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Author(s)
Alver, Burak Han
Ballintijn, Maarten
Busza, Wit
Decowski, Michael P.
Gulbrandsen, K.
Henderson, C.
Kane, J. L.
Kulinich, Piotr
Reed, C.
Stephans, George S. F.
Date Issued
February 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Alver, B. et al. “High Transverse Momentum Triggered Correlations over a Large Pseudorapidity Acceptance in Au+Au Collisions at sNN=200 GeV.” Physical Review Letters 104.6 (2010): 062301. Print.
Version
Final published version
Abstract
A measurement of two-particle correlations with a high transverse momentum trigger particle (p[subscript T][superscript trig]>2.5 GeV/c) is presented for Au+Au collisions at √sNN=200 GeV over the uniquely broad longitudinal acceptance of the PHOBOS detector (-4<Δη<2). A broadening of the away-side azimuthal correlation compared to elementary collisions is observed at all Δη. As in p+p collisions, the near side is characterized by a peak of correlated partners at small angle relative to the trigger particle. However, in central Au+Au collisions an additional correlation extended in Δη and known as the “ridge” is found to reach at least |Δη|≈4. The ridge yield is largely independent of Δη over the measured range, and it decreases towards more peripheral collisions. For the chosen p[subscript T][superscript trig] cut, the ridge yield is consistent with zero for events with less than roughly 100 participating nucleons.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.104.062301
