Sigma-meson in hot and dense matter
High Energy Physics - Phenomenology
2014-11-17 v2
Abstract
An important role of the scalar isoscalar sigma-meson in the low-energy physics is discussed. The behavior of the sigma-meson in the hot and dense medium is studied. It is shown that in the vicinity of critical values of temperature(T) and chemical potential(m) the sigma-meson can become a sharp resonance. This effect can lead to a strong enhancement of the processes pi pi -> gamma gamma and pi pi-> pi pi near the two-pion threshold. Experimental observation of this phenomenon can be interpreted as a signal of approaching the domain where the chiral symmetry restoration and phase transition of the hadron matter into quark-gluon plasma take place.
Keywords
Cite
@article{arxiv.hep-ph/0203170,
title = {Sigma-meson in hot and dense matter},
author = {M. K. Volkov and A. E. Radzhabov and N. L. Russakovich},
journal= {arXiv preprint arXiv:hep-ph/0203170},
year = {2014}
}
Comments
16 pages, 8 figures; figures 6,7 replaced