Disappearance of Back-To-Back High-pT Hadron Correlations in Central Au+Au Collisions at (sNN)=200 GeV
Abstract
Azimuthal correlations for large transverse momentum charged hadrons have been measured over a wide pseudorapidity range and full azimuth in Au+Au and p+p collisions at (sNN)=200 GeV. The small-angle correlations observed in p+p collisions and at all centralities of Au+Au collisions are characteristic of hard-scattering processes previously observed in high-energy collisions. A strong back-to-back correlation exists for p+p and peripheral Au+Au. In contrast, the back-to-back correlations are reduced considerably in the most central Au+Au collisions, indicating substantial interaction as the hard-scattered partons or their fragmentation products traverse the medium.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2003
- DOI:
- 10.1103/PhysRevLett.90.082302
- arXiv:
- arXiv:nucl-ex/0210033
- Bibcode:
- 2003PhRvL..90h2302A
- Keywords:
-
- 25.75.-q;
- Relativistic heavy-ion collisions;
- Nuclear Experiment
- E-Print:
- submitted to Phys. Rev. Lett