Azimuthal di-hadron correlations in d+ Au and Au + Au collisions at √sNN=200 GeV measured at the STAR detector
Author(s)
Balewski, Jan T.; Betancourt, Michael Joseph; Corliss, Ross Cameron; Hays-Wehle, James Prewitt; Jones, Christopher LaDon; Kocoloski, Adam Philip; Leight, William Axel; Sakuma, Tai; Seele, Joseph Patrick; Surrow, Bernd; Hoffman, Alan Michael; Milner, Richard G; Redwine, Robert P; van Nieuwenhuizen, Gerrit J; Walker, Matthew H; ... Show more Show less
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Alternative title
Azimuthal di-hadron correlations in d+ Au and Au + Au collisions at [square root]s[subscript NN]=200 GeV measured at the STAR detector
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Show full item recordAbstract
Yields, correlation shapes, and mean transverse momenta pT [rho tau] of charged particles associated with intermediate- to high-pT [rho tau] trigger particles (2.5<pT[rho tau]<10 GeV/c) in d+ Au and Au + Au collisions at √[square root]sNN=200 GeV are presented. For associated particles at higher pT [rho tau] ≳2.5 GeV/c, narrow correlation peaks are seen in d+ Au and Au + Au, indicating that the main production mechanism is jet fragmentation. At lower associated particle pT [rho tau] <2 GeV/c, a large enhancement of the near- (Δϕ~0[delta phi~0]) and away-side (Δϕ~π [delta phi~pi]) associated yields is found, together with a strong broadening of the away-side azimuthal distributions in Au + Au collisions compared to d+ Au measurements, suggesting that other particle production mechanisms play a role. This is further supported by the observed significant softening of the away-side associated particle yield distribution at Δϕ~π [delta phi~pi] in central Au + Au collisions.
Date issued
2010-08Department
Bates Linear Accelerator Center; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical review C
Publisher
American Physical Society
Citation
Aggarwal, M. et al. “Azimuthal di-hadron correlations in d+ Au and Au + Au collisions at sqrt[s_{NN}]=200 GeV measured at the STAR detector.” Physical Review C 82.2 (2010): n. pag. © 2010 The American Physical Society
Version: Final published version
ISSN
0556-2813