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arxiv: 1206.0025 · v3 · pith:C4ATQ7E3new · submitted 2012-05-31 · ⚛️ nucl-th · astro-ph.SR· hep-ph· nucl-ex

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

I. Tews , T. Krueger , K. Hebeler , A. Schwenk This is my paper
classification ⚛️ nucl-th astro-ph.SRhep-phnucl-ex
keywords forcesmattern3loneutronchiraleffectivefieldfirst
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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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