In-Medium Effective Pion Mass from Heavy-Baryon Chiral Perturbation Theory

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Using heavy-baryon chiral perturbation theory, we have calculated all the diagrams up to two-loop order which contribute to the S-wave pion self-energy in symmetric nuclear matter. Some subtleties related to the definition of pion fields are discussed. The in-medium pion mass is turned out to be increased by only (5 - 6) per cents in normal nuclear matter density, without any off-shell ambiguity.
9 pages with 3 eps figures

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Nuclear Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/197641

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/nucl-th/0101064
 http://arxiv.org/abs/nucl-th/0101064
 J.KoreanPhys.Soc.41:195-199,2002

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arXiv