Nuclear-matter saturation and symmetry energy within <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="normal">Δ</mml:mi></mml:math>-full chiral effective field theory
W. G. Jiang, C. Forssén, T. Djärv, G. Hagen
Abstract
Nuclear saturation and the symmetry energy are key properties of low-energy nuclear physics that depend on fine details of the nuclear interaction. The equation of state around saturation is also an important anchor for extrapolations to higher densities and studies of neutron stars. Here we develop a unified statistical framework that uses realistic nuclear forces to link the theoretical modeling of finite nuclei and infinite nuclear matter. We construct fast and accurate emulators for nuclear-matter observables and employ an iterative history-matching approach to explore and reduce the enormous parameter domain of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi mathvariant="normal">Δ</a:mi></a:math>-full chiral interactions. We perform rigorous uncertainty quantification and find that model calibration including <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mmultiscripts><c:mi mathvariant="normal">O</c:mi><c:mprescripts/><c:none/><c:mn>16</c:mn></c:mmultiscripts></c:math> observables gives saturation predictions that are more precise than those that only use few-body data. Published by the American Physical Society 2024