Work

Equation of state and Fermi liquid properties of dense matter based on chiral effective field theory interactions

Year: 2025

Type: article

Abstract: We present results for the equation of state of symmetric nuclear matter and pure neutron matter obtained in many-body-perturbation theory (MBPT) up to third order, based on various chiral two- and three-nucleon interactions used in calculations of nuclei. We extract equation of state properties, such as the incompressibility and the symmetry energy, and discuss estimates of the theoretical uncertainties due to neglected higher-order contributions in the MBPT expansion as well as the chiral effective field theory expansion. In addition, we discuss the Fermi liquid approach to nuclear matter. We calculate all two- and three-nucleon contributions to the quasiparticle interaction up to second order in MBPT and present results for the Landau parameters, effective mass, and speed of sound for pure neutron matter.

Source: Physical Review C

DOI: 10.1103/ls3l-dn1y

Authors: F. Alp, Y. Dietz, K. Hebeler, A. Schwenk

Institutions: GSI Helmholtz Centre for Heavy Ion Research, Technische Universität Darmstadt, Max Planck Institute for Nuclear Physics

Language: English

Topic: Nuclear physics research studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Deutsche Forschungsgemeinschaft, European Research Council, Horizon 2020

Awards: G19405907, SFB 1245: Atomkerne: Von fundamentalen Wechselwirkungen zu Struktur und Sternen