Scaling Properties of Proton and Antiproton Production in √sNN = 200 GeV Au + Au Collisions
Physical Review Letters Volume 91 Issue 17
Page 172301-1-172301-6
published_at 2003-10-21
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| File | |
| Title ( eng ) |
Scaling Properties of Proton and Antiproton Production in √sNN = 200 GeV Au + Au Collisions
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| Creator |
PHENIX Collaboration
Enokizono Akitomo
Hachiya Takashi
Kohama Takeshi
Nakamura Tomoaki
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| Source Title |
Physical Review Letters
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| Volume | 91 |
| Issue | 17 |
| Start Page | 172301-1 |
| End Page | 172301-6 |
| Abstract |
We report on the yield of protons and antiprotons, as a function of centrality and transverse momentum, in Au + Au collisions at √sNN = 200 GeV measured at midrapidity by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider. In central collisions at intermediate transverse momenta (1.5 < pT < 4.5 GeV/c) a significant fraction of all produced particles are protons and antiprotons. They show a centrality-scaling behavior different from that of pions. The p̅ /π and p/π ratios are enhanced compared to peripheral Au + Au, p + p, and e+e- collisions. This enhancement is limited to pT <5 GeV/c as deduced from the ratio of charged hadrons to π0 measured in the range 1.5 < pT < 9 GeV/c.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2003-10-21 |
| Rights |
Copyright (c) 2003 The American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.91.172301
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.91.172301
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