Tuesday, July 9, 2013

1307.2110 (T. Krüger et al.)

The chiral condensate in neutron matter    [PDF]

T. Krüger, I. Tews, B. Friman, K. Hebeler, A. Schwenk
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.
View original: http://arxiv.org/abs/1307.2110

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