title: Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory.
abstract: Neutron matter presents a unique system for chiral effective field theory because all many-body forces among neutrons are predicted to next-to-next-to-next-to-leading order (N(3)LO). We present the first complete N(3)LO calculation of the neutron matter energy. This includes the subleading three-nucleon forces for the first time and all leading four-nucleon forces. We find relatively large contributions from N(3)LO three-nucleon forces. Our results provide constraints for neutron-rich matter in astrophysics with controlled theoretical uncertainties.
authors: Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
authors: I
authors: I
authors: Tews
authors: T
authors: T
authors: Krüger
authors: K
authors: K
authors: Hebeler
authors: A
authors: A
authors: Schwenk