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Freeze-out time in ultrarelativistic heavy ion collisions from Coulomb effects in transverse pion spectra
- Source :
- Scopus-Elsevier, University of Copenhagen, Forschungszentrum Rossendorf; FZR-168 Pre, Physical Review C 56, No. 3, September 1997, 1553-1556
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Abstract
- The influence of the nuclear Coulomb field on transverse spectra of $\pi^+$ and $\pi^-$ measured in $Pb+Pb$ reactions at 158 A GeV has been investigated. Pion trajectories are calculated in the field of an expanding fireball. The observed enhancement of the $\pi^-/\pi^+$ ratio at small momenta depends on the temperature and transverse expansion velocity of the source, the rapidity distribution of the net positive charge, and mainly the time of the freeze-out.<br />Comment: 11 pages including 2 figures
- Subjects :
- Physics
Nuclear and High Energy Physics
Field (physics)
Nuclear Theory
Charge density
FOS: Physical sciences
Charge (physics)
Spectral line
Nuclear physics
Nuclear Theory (nucl-th)
Transverse plane
High Energy Physics - Phenomenology
Pion
High Energy Physics - Phenomenology (hep-ph)
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY
Coulomb
Rapidity
Atomic physics
Nuclear Experiment
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Scopus-Elsevier, University of Copenhagen, Forschungszentrum Rossendorf; FZR-168 Pre, Physical Review C 56, No. 3, September 1997, 1553-1556
- Accession number :
- edsair.doi.dedup.....4dd21563ce99d5a9a95eeaa200ce0d76