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Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 79: Nukleare Astrophysik

HK 79.1: Group Report

Thursday, March 7, 2013, 16:45–17:15, HSZ-403

Equation of state constraints based on chiral effective field theory interactions — •Ingo Tews1,2, Thomas Krüger1,2, Kai Hebeler3, and Achim Schwenk2,11Institut für Kernphysik, Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH — 3Department of Physics, The Ohio State University, Columbus, USA

Neutron matter presents a unique system for chiral effective field theory (EFT), because all many-body forces among neutrons are predicted to next-to-next-to-next-to-leading order (N3LO). We present the first complete N3LO calculation of the neutron matter energy. This includes the subleading three-nucleon (3N) forces for the first time and all leading four-nucleon (4N) forces. Our results provide constraints for the equation of state of neutron-rich matter in astrophysics and for the properties of neutron stars, with controlled theoretical uncertainties.

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

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