Rapidity and centrality dependence of proton and anti-proton production from Au-197 + Au-197 collisions at (S(NN))**(1/2)) = 130-GeV

The collaboration
Phys.Rev.C 70 (2004) 041901, 2004.

Abstract (data abstract)
We report on the rapidity and centrality dependence of proton and antiproton transverse mass distributions from Au+Au collisions at 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 $0.35<p_T<1.0$ 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.

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Data from Figure 1.0

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$p$ differential yield. Systematic uncertainties are $\pm$10%.

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$\bar{p}$ differential yield. Systematic uncertainties are $\pm$10%.

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Rapidity distribution of $p$. Combined statitiscal uncertainty and systematic uncertainty from PID contramination. Systematic uncertainties from the track reconstruction efficiency...

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Data from Figure 2.0

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Rapidity distribution of $\bar{p}$. Combined statitiscal uncertainty and systematic uncertainty from PID contramination. Systematic uncertainties from the track reconstruction efficiency...

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Data from Figure 2.0

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Average transverse momentum of $p+\bar{p}$. Systematic uncertainties are $\pm$6%.

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Data from Figure 3.0

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Average transverse momentum vs. centrality. Systematic error bands in figure are $\pm$6% for .

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Data from Figure 3.0

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$dN/dy$ vs. centrality. Systematic error bands in figure are $\pm$25% for dN/dy.

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Data from Figure 3.0

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$dN/dy$ vs. centrality. Systematic error bands in figure are $\pm$25% for dN/dy.

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Data from Figure 3.0

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Average transverse momentum vs. the number of negative hadrons. Systematic error bands in figure are $\pm$6% for .

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Data from Figure 3.0

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$dN/dy$ vs. the number of negative hadrons. Systematic error bands in figure are $\pm$25% for dN/dy.

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Data from Figure 3.0

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$dN/dy$ vs. the number of negative hadrons. Systematic error bands in figure are $\pm$25% for dN/dy.