In-medium effects on the $K^-/K^+$ ratio at GSI
Nuclear Theory
2009-11-10 v2
Abstract
The in-medium modifications on the ratio produced at GSI are studied. Particular attention is paid to the properties of antikaons, which determine the chemical potential and temperature at freeze-out conditions. Different approaches have been considered: non-interacting , on-shell self-energy and single-particle spectral density. We observe that the full off-shell approach reproduces the "broad-band equilibration" advocated by Brown being the spectral density crucial to explain an enhanced ratio.
Cite
@article{arxiv.nucl-th/0312051,
title = {In-medium effects on the $K^-/K^+$ ratio at GSI},
author = {L. Tolos and A. Polls and A. Ramos and J. Schaffner-Bielich},
journal= {arXiv preprint arXiv:nucl-th/0312051},
year = {2009}
}
Comments
4 pages, 3 figures. Contributed parallel talk to the International Conference on Hypernuclear and Strange Particle Physics (HYP2003), Jefferson Lab, Newport News, Virginia (USA), Oct 14-18, 2003