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Azimuthal di-hadron correlations in d+Au and Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV from STAR
- Source :
- Physical Review C, Physical Review C, American Physical Society, 2010, 82, pp.024912. ⟨10.1103/PhysRevC.82.024912⟩
- Publication Year :
- 2010
- Publisher :
- HAL CCSD, 2010.
-
Abstract
- Yields, correlation shapes, and mean transverse momenta \pt{} of charged particles associated with intermediate to high-\pt{} trigger particles ($2.5 < \pt < 10$ \GeVc) in d+Au and Au+Au collisions at $\snn=200$ GeV are presented. For associated particles at higher $\pt \gtrsim 2.5$ \GeVc, narrow correlation peaks are seen in d+Au and Au+Au, indicating that the main production mechanism is jet fragmentation. At lower associated particle $\pt < 2$ \GeVc, a large enhancement of the near- ($\dphi \sim 0$) and away-side ($\dphi \sim ��$) 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 $\dphi \sim ��$ in central Au+Au collisions.<br />16 pages, 11 figures, updated after journal review
Details
- Language :
- English
- ISSN :
- 24699985 and 24699993
- Database :
- OpenAIRE
- Journal :
- Physical Review C, Physical Review C, American Physical Society, 2010, 82, pp.024912. ⟨10.1103/PhysRevC.82.024912⟩
- Accession number :
- edsair.doi.dedup.....42f6001d4cddd8c6b0cda96a5ed48ea8