Nucleon sigma term and quark condensate in nuclear matter

Abstract

We study the bound nucleon sigma term and the quark condensate in nuclear matter. In the quark-meson coupling (QMC) model the nuclear correction to the sigma term is small and negative, i.e., it decelerates the decrease of the quark condensate in nuclear matter. However, the quark condensate in nuclear matter is controlled primarily by the scalar-isoscalar $\sigma$ field. Compared to the leading term, it moderates the decrease more than that of the nuclear sigma term alone at densities around and larger than the normal nuclear matter density.

Abstract changed, version accepted for publication in EPJA, 3 pages, 2 figures, EPJ style, talk given at QNP06, June 5 - June 10, 2006, Madrid, Spain

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Cited by in corpus (4)

• EoS for massive neutron stars
• The chiral quark condensate and pion decay constant in nuclear matter at next-to-leading order
• A New Approach to Physics of Nuclei
• Naive versus mirror assignment at finite density: correlator mixing and chiral symmetry restoration