Coulomb Effects on Particle Spectra in Relativistic Nuclear Collisions

Details Coulomb Effects on Particle Spectra in Relativistic Nuclear Collisions Coulomb Effects on Particle Spectra in Relativistic Nuclear Collisions

1997-11-28

arxiv.org/abs/nucl-th/9711064v2

Phys.Rev.C57:2536-2546,1998

Physics

Nuclear Physics

Nuclear Theory

22 pages including 12 figures. Added figure and revisions

Scientific paper

10.1103/PhysRevC.57.2536

Coulomb effects on $\pi^\pm$ and $K^\pm$ spectra in relativistic nuclear collisions are investigated. At collision energies around 1 GeV the ratio of $\pi^-$ to $\pi^+$ is enhanced several times at low transverse momenta but less at ultrarelativistic energies. We describe the ratios at SIS, AGS and SPS energies with simple analytic models as well as more elaborate numerical models incorporating the expansion dynamics. The Coulomb effect depends on the properties of the source after the violent collision phase and provides information on source sizes, freeze-out times, and expansion velocities. Comparison with results from HBT analyses are made. Predictions for $\pi^\pm$ and $K^\pm$ at RHIC and LHC energies are given.

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