Application of the thermal model with longitudinal flow to charged pions in central Ru + Ru collisions at 400A and 1528A MeV

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Abstract

We formulate a thermal model by considering the longitudinal flow, the modification of the Δ(1232)-spectral function, and the Coulomb interaction. The model calculations are compared with the transverse momentum and rapidity spectra of charged pions in central Ru + Ru collisions at 400A and 1528.A MeV. The average longitudinal flow velocities of the fireball are deduced to be about 18 and 24% of the speed of light at 400A and 1528A MeV, respectively. It is also possible that the origin of the longitudinally elongated pion spectra is due to an incomplete stopping of the projectile and the target nuclei.

Original languageEnglish
Pages (from-to)1083-1089
Number of pages7
JournalJournal of the Korean Physical Society
Volume46
Issue number5
Publication statusPublished - 2005 May

Keywords

  • Charged pions
  • Heavy-ion collisions
  • Longitudinal expansion
  • Nuclear stopping
  • Thermal model

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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