Rapidity and centrality dependence of proton and anti-proton production from 197Au+197Au collisions at {radical}(s{sub NN}) = 130 GeV
We report on the rapidity and centrality dependence of proton and anti-proton transverse mass distributions from {sup 197}Au + {sup 197}Au collisions at {radical}s{sub NN} = 130 GeV as measured by the STAR experiment at RHIC. Our results are from the rapidity and transverse momentum range of |y| < 0.5 and 0.35 < p{sub t} < 1.00 GeV/c. For both protons and anti-protons, 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(anti-proton) yields and transverse mass distributions the possibility of pre-hadronic collective expansion may have to be taken into account.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of Science. Office of High Energy and Nuclear Physics. Division of Nuclear Physics; National Science Foundation (NSF); German BMBF, France IN2P3, United Kingdom EPSRC, Brazil FAPESP, Russian Ministry of Science and Technology, China Ministry of Education, National Natural Science Foundation (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 840887
- Report Number(s):
- LBNL-55120; R&D Project: NRNC; TRN: US0502178
- Journal Information:
- Physical Review C, Vol. 70, Issue 4; Other Information: Submitted to Physical Review C: Volume 70, No.4; Journal Publication Date: 10/2004; PBD: 20 Jun 2003
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rapidity and centrality dependence of proton and antiproton production from {sup 197}Au+{sup 197}Au collisions at {radical}(S{sub NN})=130 GeV
Mid-rapidity anti-proton to proton ratio from Au+Au collisions at √(sNN) = 130 GeV.