Finite temperature spectral function of the $\sigma$ meson from large N expansion
High Energy Physics - Phenomenology
2009-11-07 v1
Abstract
The spectral function of the scalar-isoscalar channel of the O(N) symmetric linear model is studied in the broken symmetry phase. The investigation is based on the leading order evaluation of the self-energy in the limit of large number of Goldstone bosons. We describe its temperature dependent variation in the whole low temperature phase. This variation closely reflects the trajectory of the scalar-isoscalar quasiparticle pole. In the model with no explicit chiral symmetry breaking we have studied near the critical point also the corresponding dynamical exponent.
Cite
@article{arxiv.hep-ph/0206039,
title = {Finite temperature spectral function of the $\sigma$ meson from large N expansion},
author = {A. Patkos and Zs. Szep and P. Szepfalusy},
journal= {arXiv preprint arXiv:hep-ph/0206039},
year = {2009}
}
Comments
9 pages, 3 figures. To be published in Proc. of Budapest'02 Workshop on Quark and Hadron Dynamics, Budapest, Hungary, March 3--7, 2002