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Identified particle distributions in pp and Au+Au collisions at sqrt{s_NN}=200 GeV

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arxiv nucl-ex/0310004 v1 pith:W5VVBI6I submitted 2003-10-06 nucl-ex

STAR Collaboration: J. Adams , et al This is my paper · ORCID
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keywords collisionscentralchemicaldistributionsrapiditychargedfreeze-outindependent
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Transverse mass and rapidity distributions for charged pions, charged kaons, protons and antiprotons are reported for sqrt{s_NN}=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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Cited by 3 Pith papers

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  1. Disentangling Initial-State and Evolution Effects in Heavy-Ion Collisions Using EPOS and PHSD

    hep-ph 2025-09 conditional novelty 5.0 of 10

    By swapping initial conditions and evolution engines between EPOS and PHSD, the authors find that the dynamical evolution stage, not the initial state, dominates final hadron spectra and elliptic flow in 200 GeV Au+Au...

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    A data-driven correction built from combinatorial kaon pairs inside the phi mass window is tested with toy Monte Carlo, showing partial success and clear shortcomings.

  3. Investigating effects of the electrical conductivity of QCD matter on charge-dependent directed flow

    nucl-th 2025-02 conditional novelty 4.0 of 10

    Using 3+1D resistive magnetohydrodynamics, the authors show that the slope of proton-antiproton charge-dependent directed flow in Au+Au collisions at 200 GeV varies with the QGP's electrical conductivity and can chang...

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