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

Autor:	Tews, I., Krueger, T., Hebeler, K., Schwenk, A.
Rok vydání:	2012
Předmět:	Nuclear Theory Astrophysics - Solar and Stellar Astrophysics High Energy Physics - Phenomenology Nuclear Experiment
Zdroj:	Phys. Rev. Lett. 110, 032504 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.110.032504
Popis:	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. Comment: 5 pages, 4 figures; improved version, 3N ring and 2pi-contact contributions corrected, conclusions unchanged; v3: minor changes, published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1206.0025 Zobrazit plný text záznamu View this record from Arxiv