Chiral condensates and size of the sigma term
Nuclear Theory
2007-05-23 v1
Abstract
The in-medium chiral condensate is studied with a new approach which has the advantage of no need for extra assumptions on the current mass derivatives of model parameters. It is shown that the pion-nucleon sigma term is 9/2 times the average current mass of light quarks, if quark confinement is linear. Considering both perturbative and non-perturbative interactions, the chiral condensate decreases monotonously with increasing densities, approaching to zero at about 4 fm^{-3}.
Cite
@article{arxiv.nucl-th/0412105,
title = {Chiral condensates and size of the sigma term},
author = {G. X. Peng},
journal= {arXiv preprint arXiv:nucl-th/0412105},
year = {2007}
}
Comments
11 pages, 1 figure, elsart style