Nuclear-matter equation of state with consistent two- and three-body perturbative chiral interactions
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We compute the energy per particle of infinite symmetric nuclear matter from chiral NLO3 (next-to-next-to-next-to-leading order) two-body potentials plus NLO2 three-body forces. The low-energy constants of the chiral three-nucleon force that cannot be constrained by two-body observables are fitted to reproduce the triton binding energy and the H3-He3 Gamow-Teller transition matrix element. In this way, the saturation properties of nuclear matter are reproduced in a parameter-free approach. The equation of state is computed up to third order in many-body perturbation theory, with special emphasis on the role of the third-order particle-hole diagram. The dependence of these results on the cutoff scale and regulator function is studied. We find that the inclusion of three-nucleon forces consistent with the applied two-nucleon interaction leads to a reduced dependence on the choice of the regulator only for lower values of the cutoff. 2014 American Physical Society.
author list (cited authors)
Coraggio, L., Holt, J. W., Itaco, N., Machleidt, R., Marcucci, L. E., & Sammarruca, F.
complete list of authors
Coraggio, L||Holt, JW||Itaco, N||Machleidt, R||Marcucci, LE||Sammarruca, F