Probing nuclear expansion dynamics with $\pi^-/\pi^+$-spectra
Nuclear Theory
2009-10-30 v1
Abstract
We study the dynamics of charged pions in the nuclear medium via the ratio of differential - and -spectra in a coupled-channel BUU (CBUU) approach. The relative energy shift of the charged pions is found to correlate with the pion freeze-out time in nucleus-nucleus collisions as well as with the impact parameter of the heavy-ion reaction. Furthermore, the long-range Coulomb force provides a 'clock' for the expansion of the hot nuclear system. Detailed comparisons with experimental data for at 1 GeV/A and at 2.0 GeV/A are presented.
Cite
@article{arxiv.nucl-th/9701057,
title = {Probing nuclear expansion dynamics with $\pi^-/\pi^+$-spectra},
author = {S. Teis and W. Cassing and M. Effenberger and A. Hombach and U. Mosel and Gy. Wolf},
journal= {arXiv preprint arXiv:nucl-th/9701057},
year = {2009}
}
Comments
21 pages, latex, figures included