Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory

2012/06/30 by I. Tews, T. Krueger, K. Hebeler +1 · 1 citation
Physics and Astronomy · #nucl-th #astro-ph.SR #hep-ph #nucl-ex

paper · pdf · doi:10.1103/physrevlett.110.032504

published as Phys. Rev. Lett. 110, 032504 (2013) · 5 pages, 4 figures; improved version, 3N ring and 2pi-contact contributions corrected, conclusions unchanged; v3: minor changes, published version

arxiv created 2013/02/04 · arxiv updated 2013/02/05

Abstract

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. We find relatively large contributions from N3LO 3N forces. Our results provide constraints for neutron-rich matter in astrophysics with controlled theoretical uncertainties.

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