A Non-Perturbative Treatment of the Pion in the Linear Sigma-Model
Z. Aouissat, G. Chanfray, P. Schuck, J. Wambach
Abstract
Using a non-perturbative method based on the selfconsistent Quasi-particle Random-Phase Approximation (QRPA) we describe the properties of the pion in the linear σ-model. It is found that the pion is massless in the chiral limit, both at zero- and finite temperature, in accordance with Goldstone's theorem.
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