Chiral condensates and size of the sigma term
arXiv:nucl-th/0412105 · doi:10.1016/j.nuclphysa.2004.09.058
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}.
11 pages, 1 figure, elsart style
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Cited by in corpus (5)
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