Rapidity and centrality dependence of proton and antiproton production from {sup 197}Au+{sup 197}Au collisions at {radical}(S{sub NN})=130 GeV

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.70.041901· OSTI ID:20695628

Adams, J; Blyth, C O; Jones, P G; Lamont, M A.C.; Nelson, J M ^[1]; Adler, C; Berger, J; Dietel, T; Flierl, D; Kollegger, T; Lange, S; Stock, R; Struck, C ^[2]; Aggarwal, M M; Bhati, A K; Kumar, A; Sharma, M; Sood, G ^[3]; Ahammed, Z; Cardenas, A ^[4]

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1. University of Birmingham, Birmingham (United Kingdom)
2. University of Frankfurt, Frankfurt (Germany)
3. Panjab University, Chandigarh, 160014 (India)
4. Purdue University, West Lafayette, Indiana 47907 (United States); and others

We report on the rapidity and centrality dependence of proton and antiproton 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 the Relativistic Heavy Ion Collider (RHIC). Our results are from the rapidity and transverse momentum range of vertical bar y vertical bar <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.

• OSTI ID: 20695628
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 70; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIPROTONS
BROOKHAVEN RHIC
COLLECTIVE MODEL
COMPARATIVE EVALUATIONS
GEV RANGE
GOLD 197 REACTIONS
GOLD 197 TARGET
MASS DISTRIBUTION
MULTIPARTICLE SPECTROMETERS
OIL YIELDS
PARTICLE PRODUCTION
PARTICLE RAPIDITY
TRANSVERSE MOMENTUM