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arXiv · 1307.2110

The chiral condensate in neutron matter

T. Krüger·I. Tews·B. Friman·K. Hebeler·A. Schwenk
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Abstract

We calculate the chiral condensate in neutron matter at zero temperature based on nuclear forces derived within chiral effective field theory. Two-, three- and four-nucleon interactions are included consistently to next-to-next-to-next-to-leading order (N3LO) of the chiral expansion. We find that the interaction contributions lead to a modest increase of the condensate, thus impeding the restoration of chiral symmetry in dense matter and making a chiral phase transition in neutron-rich matter unlikely for densities that are not significantly higher than nuclear saturation density.

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T. Krüger, I. Tews, B. Friman, K. Hebeler, A. Schwenk. 2013-09-30. The chiral condensate in neutron matter. https://doi.org/10.1016/j.physletb.2013.08.022

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