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Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 79: Nukleare Astrophysik

HK 79.4: Talk

Thursday, March 7, 2013, 18:00–18:15, HSZ-403

Chiral condensate in neutron matter — •Thomas Krüger1,2, Ingo Tews1,2, Bengt Friman3, Kai Hebeler4, and Achim Schwenk2,11Institut für Kernphysik, Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 3GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 4Department of Physics, The Ohio State University, Columbus, USA

The chiral condensate is the order parameter of spontaneous chiral symmetry breaking. We present results for the chiral condensate at nuclear and subnuclear densities in neutron matter based on chiral effective field theory (EFT). The calculations are based on a complete neutron matter calculation at next-to-next-to-next-to-leading order (N3LO) with estimates of the theoretical uncertainties. Our results provide constraints for astrophysics, and limit the possibility of a phase transition to quark matter at nuclear densities (n ≲ 0.2 fm−3).

This work was supported by the DFG through Grant SFB 634, by the ERC Grant No. 307986 STRONGINT, and by the Helmholtz Alliance HA216/EMMI.

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