Thermodynamics of isospin-asymmetric nuclear matter from chiral effective field theory

Wellenhofer, Corbinian; Holt, Jeremy W.; Kaiser, Norbert

doi:10.1103/physrevc.92.015801

Cited by 102 publications

(136 citation statements)

References 83 publications

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“…This is of particular interest, as chiral EFT interactions can be used to calculate and constrain the EOS (for recent work, see Refs. [38][39][40][41][42][43]), eventually allowing for a consistent treatment of neutrino interactions and the EOS.…”

Section: Discussionmentioning

confidence: 99%

Impact of nucleon-nucleon bremsstrahlung rates beyond one-pion exchange

et al. 2016

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Neutrino-pair production and annihilation through nucleon-nucleon bremsstrahlung is included in current supernova simulations by rates that are based on the one-pion-exchange approximation. Here we explore the consequences of bremsstrahlung rates based on a modern nuclear interactions for proto-neutron star cooling and the corresponding neutrino emission. We find that despite a reduction of the bremsstrahlung emission by a factor of 2-5 in the neutrinospheric region, models with the improved treatment exhibit only < ∼5% changes of the neutrino luminosities and an increase of < ∼0.7 MeV of the average energies of the radiated neutrino spectra, with the largest effects for the antineutrinos of all flavors and at late times. Overall, the proto-neutron star cooling evolution is slowed down modestly by < ∼0.5-1 s.

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Section: Discussionmentioning

confidence: 99%

Impact of nucleon-nucleon bremsstrahlung rates beyond one-pion exchange

et al. 2016

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“…For symmetric and asymmetric nuclear matter (including thermodynamics), uncertainty estimates can be drawn from recent advanced perturbative ChEFT calculations such as those of Refs. [92,93,94,95]. For example, the energy per particle in neutron matter at n ∼ n 0 is subject to an uncertainty of ∆E n /A 4 MeV, opening up to a band at higher densities that is comparable to the grey "QMC" area in Fig.…”

Section: Asymmetric Nuclear Matter and Neutron Mattermentioning

confidence: 99%

Functional renormalization group studies of nuclear and neutron matter

Drews

Weise

2017

Progress in Particle and Nuclear Physics

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Functional renormalization group (FRG) methods applied to calculations of isospinsymmetric and asymmetric nuclear matter as well as neutron matter are reviewed. The approach is based on a chiral Lagrangian expressed in terms of nucleon and meson degrees of freedom as appropriate for the hadronic phase of QCD with spontaneously broken chiral symmetry. Fluctuations beyond mean-field approximation are treated solving Wetterich's FRG flow equations. Nuclear thermodynamics and the nuclear liquid-gas phase transition are investigated in detail, both in symmetric matter and as a function of the proton fraction in asymmetric matter. The equations of state at zero temperature of symmetric nuclear matter and pure neutron matter are found to be in good agreement with advanced ab-initio many-body computations. Contacts with perturbative many-body approaches (in-medium chiral perturbation theory) are discussed. As an interesting test case, the density dependence of the pion mass in the medium is investigated. The question of chiral symmetry restoration in nuclear and neutron matter is addressed. A stabilization of the phase with spontaneously broken chiral symmetry is found to persist up to high baryon densities once fluctuations beyond mean-field are included. Neutron star matter including beta equilibrium is discussed under the aspect of the constraints imposed by the existence of two-solar-mass neutron stars.

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“…Chiral EFT interactions have been applied to asymmetric matter only recently [26][27][28]. Explicit calculations at general proton fractions allow to extract key quantities like the nuclear symmetry energy more microscopically, because no empirical parametrizations for the energy as a function of the isospin asymmetry are needed.…”

Section: Introductionmentioning

confidence: 99%

“…Commonly, such parametrizations were either based on the standard quadratic expansion (see, e.g., Ref. [27] for a recent work) or inspired by the form of energy-density functionals (see, e.g., Ref. [29]).…”

Section: Introductionmentioning

confidence: 99%

Asymmetric nuclear matter based on chiral two- and three-nucleon interactions

2016

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We calculate the properties of isospin-asymmetric nuclear matter based on chiral nucleon-nucleon (NN) and three-nucleon (3N) interactions. To this end, we develop an improved normal-ordering framework that allows to include general 3N interactions starting from a plane-wave partial-wavedecomposed form. We present results for the energy per particle for general isospin asymmetries based on a set of different Hamiltonians, study their saturation properties, the incompressibility, symmetry energy, and also provide an analytic parametrization for the energy per particle as a function of density and isospin asymmetry.

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Thermodynamics of isospin-asymmetric nuclear matter from chiral effective field theory

Cited by 102 publications

References 83 publications

Impact of nucleon-nucleon bremsstrahlung rates beyond one-pion exchange

Impact of nucleon-nucleon bremsstrahlung rates beyond one-pion exchange

Functional renormalization group studies of nuclear and neutron matter

Asymmetric nuclear matter based on chiral two- and three-nucleon interactions

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