Identified particle distributions in pp and Au+Au collisions atsqrt sNN=200 GeV

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Transverse mass and rapidity distributions for charged pions, charged kaons, protons and antiprotons are reported for {radical}sNN = 200 GeV pp and Au+Au collisions at RHIC. The transverse mass distributions are rapidity independent within |y| < 0.5, consistent with a boost-invariant system in this rapidity interval. Spectral shapes and relative particle yields are similar in pp and peripheral Au+Au collisions and change smoothly to central Au+Au collisions. No centrality dependence was observed in the kaon and antiproton production rates relative to the pion production rate from medium-central to central collisions. Chemical and kinetic equilibrium model fits to our data reveal ... continued below

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Adams, J.; Adler, C.; Aggarwal, M.M.; Ahammed, Z.; Amonett, J.; Anderson, B.D. et al. October 6, 2003.

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Transverse mass and rapidity distributions for charged pions, charged kaons, protons and antiprotons are reported for {radical}sNN = 200 GeV pp and Au+Au collisions at RHIC. The transverse mass distributions are rapidity independent within |y| < 0.5, consistent with a boost-invariant system in this rapidity interval. Spectral shapes and relative particle yields are similar in pp and peripheral Au+Au collisions and change smoothly to central Au+Au collisions. No centrality dependence was observed in the kaon and antiproton production rates relative to the pion production rate from medium-central to central collisions. Chemical and kinetic equilibrium model fits to our data reveal strong radial flow and relatively long duration from chemical to kinetic freeze-out in central Au+Au collisions. The chemical freeze-out temperature appears to be independent of initial conditions at RHIC energies.

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  • Journal Name: Physical Review Letters; Journal Volume: 92; Related Information: Journal Publication Date: 03/19/2004

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  • Report No.: LBNL--55125
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 900936
  • Archival Resource Key: ark:/67531/metadc879814

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  • October 6, 2003

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  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 29, 2016, 2:52 p.m.

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Adams, J.; Adler, C.; Aggarwal, M.M.; Ahammed, Z.; Amonett, J.; Anderson, B.D. et al. Identified particle distributions in pp and Au+Au collisions atsqrt sNN=200 GeV, article, October 6, 2003; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc879814/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.