Rapidity and centrality dependence of proton and antiproton production from 197Au + 197Au collisions at sqrt[SNN ]=130 GeV
We report on the rapidity and centrality dependence of proton and antiproton transverse mass distributions from 197Au + 197Au collisions at sqrt[sNN ]=130 GeV as measured by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). Our results are from the rapidity and transverse momentum range of |y| <0.5 and 0.35< pt <1.00 GeV/c . For both protons and antiprotons, transverse mass distributions become more convex from peripheral to central collisions demonstrating characteristics of collective expansion. The measured rapidity distributions and the mean transverse momenta versus rapidity are flat within |y| <0.5 . Comparisons of our data with results from model calculations indicate that in order to obtain a consistent picture of the proton (antiproton) yields and transverse mass distributions the possibility of prehadronic collective expansion may have to be taken into account.
| Author: | J. Adams, Clemens Adler, Jens Berger, Thomas Dietel, Dominik Bernhard Flierl, Thorsten Kollegger, Jens Sören Lange, Reinhard Stock, Christof Struck, et al., STAR Collaboration |
|---|---|
| URN: | urn:nbn:de:hebis:30-19042 |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 14.10.2005 |
| Year of first Publication: | 2004 |
| Publishing Institution: | Univ.-Bibliothek Frankfurt am Main |
| Source: | Phys. Rev. C 70, 041901 (2004), ©2004 The American Physical Society, http://link.aps.org/abstract/PRC/v70/e041901 |
| HeBIS PPN: | 191788511 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 530 Physik |
| PACS-Classification: | 25.75.Dw Particle and resonance production |
| 25.75.Ld Collective flow | |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Veröffentlichungsvertrag für Publikationen ohne Print on Demand |
