Nuclear matter in the chiral limit and the in-medium chiral condensate

Details Nuclear matter in the chiral limit and the in-medium chiral condensate Nuclear matter in the chiral limit and the in-medium chiral condensate

2007-10-19

arxiv.org/abs/0710.3700v1

Nucl.Phys.A798:75-95,2008

Physics

Nuclear Physics

Nuclear Theory

30 pages, 5 figs. To appear in Nuclear Physics A

Scientific paper

10.1016/j.nuclphysa.2007.10.009

We investigate nuclear matter, i.e. the nuclear equation-of-state (EOS) as well as the relativistic mean fields in the chiral limit. The investigations are based on a chiral nucleon-nucleon EFT interaction where the explicit and implicit pion mass dependence is known up to next-to-leading order. The nuclear bulk properties are found to remain fairly stable in the chiral limit. Based on the same interaction the in-medium scalar condensate is derived, both in Hartree-Fock approximation as well as from the Brueckner G-matrix, making thereby use of the Hellman-Feynman theorem. Short distance physics which determines the reduction of the in-medium nucleon mass is found to play only a minor role for the reduction of the chiral condensate.

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