ΔϕΔη correlations in central Au+Au collisions at sNN=200 GeV
Abstract
We report charged particle pair correlation analyses in the space of Δϕ (azimuth) and Δη (pseudorapidity), for central Au+Au collisions at sNN=200 GeV in the STAR detector. The analysis involves unlike-sign charged pairs and like-sign charged pairs, which are transformed into charge-dependent (CD) signals and charge-independent (CI) signals. We present detailed parametrizations of the data. A model featuring dense gluonic hot spots as first proposed by Van Hove predicts that the observables under investigation would have sensitivity to such a substructure should it occur, and the model also motivates selection of transverse momenta in the range 0.8<pt<2.0 GeV/c. Both CD and CI correlations of high statistical significance are observed, and possible interpretations are discussed.
- Publication:
-
Physical Review C
- Pub Date:
- March 2007
- DOI:
- 10.1103/PhysRevC.75.034901
- arXiv:
- arXiv:nucl-ex/0607003
- Bibcode:
- 2007PhRvC..75c4901A
- Keywords:
-
- 25.75.Gz;
- 12.38.Mh;
- 12.38.Qk;
- Particle correlations;
- Quark-gluon plasma;
- Experimental tests;
- Nuclear Experiment
- E-Print:
- 18 pages, 8 figures, 2 tables submitted- Revised version Accepted-in press Phys. Rev. C