Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 79: Nukleare Astrophysik

HK 79.4: Vortrag

Donnerstag, 7. März 2013, 18:00–18:15, HSZ-403

Chiral condensate in neutron matter^⋆ — •Thomas Krüger^1,2, Ingo Tews^1,2, Bengt Friman³, Kai Hebeler⁴, and Achim Schwenk^2,1 — ¹Institut 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.