High- , η, identified and inclusive charged hadron spectra from PHENIX
✍ Scribed by M. Shimomura
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 264 KB
- Volume
- 774
- Category
- Article
- ISSN
- 0375-9474
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✦ Synopsis
PHENIX has extended the measurement of the π 0 , η, identified and inclusive charged hadrons up to 20 GeV/c, and extended the measurement to the Cu+Cu collision system. A strong suppression is observed for both π 0 and charged hadron yields in central Au+Au and Cu+Cu collisions. Both in the Au+Au and Cu+Cu systems R AA becomes independent of p T above 5 GeV/c. Its centrality dependence is compared to two models in order to test for universal N part scaling that is independent of system; results are inconclusive. The results are compatible with energy loss predictions. In addition, the ratio of η to π 0 approaches, within uncertainties, a constant value of 0.4 ∼ 0.5 at high p T in p+p, d+Au, and Au+Au, while the ratio of K s to π 0 is also consistent with a constant value at high p T in d+Au and p+p. These results are compatible with normal jet fragmentation. * For the full list of PHENIX authors and acknowledgements, see Appendix 'Collaborations' of this volume.