Rapidity and centrality dependence of proton and anti-proton production from {sup 197}Au+{sup 197}Au collisions at {radical}{ovr s}{sub NN} = 130 GeV.

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Phys. Rev. C

OSTI ID:961450

Adams, J; Adler, C; Aggarwal, M M; Ahammed, Z; Amonett, J; Cadman, R V; Krueger, K; Spinka, H M; Underwood, D G

We report on the rapidity and centrality dependence of proton and antiproton transverse distributions from {sup 197}Au+{sup 197}Au collisions at {radical}{ovr S{sub NN}}=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<p{sub t}<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.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; NSF; FOR
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 961450
• Report Number(s): ANL-HEP-PR-03-86
• Journal Information: Phys. Rev. C, Journal Name: Phys. Rev. C Journal Issue: 4 ; Oct. 2004 Vol. 70; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
74 ATOMIC AND MOLECULAR PHYSICS
ANTIPROTONS
BROOKHAVEN RHIC
COLLISIONS
EXPANSION
GEV RANGE
GOLD 197
GOLD 197 TARGET
HEAVY IONS
MASS DISTRIBUTION
PARTICLE PRODUCTION
PARTICLE RAPIDITY
PROTONS
TRANSVERSE MOMENTUM