Publications (33)
Dirac-Brueckner-Hartree-Fock versus chiral effective field theory
F. Sammarruca, B. Chen, L. Coraggio +2
We compare nuclear and neutron matter predictions based on two different ab initio approaches to nuclear forces and the nuclear many-body problem. The first consists of a realistic…
Can chiral EFT give us satisfaction?
R. Machleidt, F. Sammarruca
We compare nuclear forces derived from chiral effective field theory (EFT) with those obtained from traditional (phenomenological and meson) models. By means of a careful analysis…
Nucleon-nucleon cross sections in neutron-rich matter
F. Sammarruca, P. Krastev
We calculate nucleon-nucleon cross sections in the nuclear medium with unequal densities of protons and neutrons. We use the Dirac-Brueckner-Hartree-Fock approach together with rea…
The impact of charge symmetry and charge independence breaking on the properties of neutrons and protons in isospin-asymmetric nuclear matter
F. Sammarruca, L. White, B. Chen
We investigate the effects of charge independence and charge symmetry breaking in neutron-rich matter. We consider neutron and proton properties in isospin-asymmetric matter at nor…
Microscopic calculations in asymmetric nuclear matter
D. Alonso, F. Sammarruca
A microscopic calculation of the equation of state for asymmetric nuclear matter is presented. We employ realistic nucleon-nucleon forces and operate within the Dirac-Brueckner-Har…
Nuclear and neutron matter equations of state from high-quality potentials up to fifth order of the chiral expansion
F. Sammarruca, L. E. Marcucci, L. Coraggio +3
We present predictions for the equation of state of symmetric nuclear and pure neutron matter based on recent high-quality nucleon-nucleon potentials from leading order to fifth or…
Comparing neutron star predictions by various microscopic models
F. Sammarruca, Pei Liu
We calculate several neutron star properties, for static and/or rotating stars, using equations of state based on different microscopic models. These include our Dirac-Brueckner-Ha…
Temperature effects on the neutron matter equation of state obtained from chiral effective field theory
F. Sammarruca, R. Machleidt, R. Millerson
Temperature effects on the neutron matter equation of state are investigated in the framework of chiral effective field theory. Latest, state-of-the-art chiral two-nucleon forces a…
Constraints on the symmetry energy and neutron skins from experiments and theory
M. B. Tsang, J. R. Stone, F. Camera +16
The symmetry energy contribution to the nuclear Equation of State (EoS) impacts various phenomena in nuclear astrophysics, nuclear structure, and nuclear reactions. Its determinati…
The nuclear matter equation of state with consistent two- and three-body perturbative chiral interactions
L. Coraggio, J. W. Holt, N. Itaco +3
We compute the energy per particle of infinite symmetric nuclear matter from chiral N3LO (next-to-next-to-next-to-leading order) two-body potentials plus N2LO three-body forces. Th…
Chiral nucleon-nucleon forces in nuclear structure calculations
L. Coraggio, A. Gargano, J. W. Holt +4
Realistic nuclear potentials, derived within chiral perturbation theory, are a major breakthrough in modern nuclear structure theory, since they provide a direct link between nucle…
Towards order-by-order calculations of the nuclear and neutron matter equations of state in chiral effective field theory
F. Sammarruca, L. Coraggio, J. W. Holt +3
We calculate the nuclear and neutron matter equations of state from microscopic nuclear forces at different orders in chiral effective field theory and with varying momentum-space…
Triton Binding Energy and Minimal Relativity
F. Sammarruca, R. Machleidt
For relativistic three-body calculations, essentially two different approaches are in use: field theory and relativistic direct interactions. Results for relativistic corrections o…
Exact treatment of Pauli exclusion effects in (p,p') reactions
E. J. Stephenson, R. C. Johnson, F. Sammarruca
This paper presents the first calculations of proton inelastic scattering in which the medium effect of Pauli blocking is included through an exact, rather than angle averaged, ope…
Comparing proton momentum distributions in and 3 nuclei via H H and He measurements
R. Cruz-Torres, S. Li, F. Hauenstein +125
We report the first measurement of the reaction cross-section ratios for Helium-3 (He), Tritium (H), and Deuterium (). The measurement covered a missing moment…
In-Medium Hadronic Interactions and the Nuclear Equation of State
F. Sammarruca
Microscopic studies of nuclear matter under diverse conditions of density and asymmetry are of great contemporary interest. Concerning terrestrial applications, they relate to futu…
The Non-Local Nature of the Nuclear Force and its Impact on Nuclear Structure
R. Machleidt, F. Sammarruca, Y. Song
We calculate the triton binding energy with a non-local NN potential that fits the world NN data below 350 MeV with the almost perfect /datum of 1.03. The non-locality is der…
Chiral EFT based nuclear forces: Achievements and challenges
R. Machleidt, F. Sammarruca
During the past two decades, chiral effective field theory has become a popular tool to derive nuclear forces from first principles. Two-nucleon interactions have been worked out u…
More on nucleon-nucleon cross sections in symmetric and asymmetric matter
F. Sammarruca, P. Krastev
Following a recent work, we present numerical results for total two-nucleon effective cross sections in isospin symmetric and asymmetric matter. The present calculations include th…
Solution of the Bethe-Goldstone Equation without Partial Wave Decomposition
L. White, F. Sammarruca
We present a method for solving the nucleon-nucleon scattering equation without the use of a partial wave expansion of the scattering amplitude. After verifying the accuracy of the…
Spin-polarized neutron matter at different orders of chiral effective field theory
F. Sammarruca, R. Machleidt, N. Kaiser
Spin-polarized neutron matter is studied using chiral two- and three-body forces. We focus, in particular, on predictions of the energy per particle in ferromagnetic neutron matter…
Momentum distributions and short-range correlations in the deuteron and He with modern chiral potentials
L. E. Marcucci, F. Sammarruca, M. Viviani +1
We study momentum distributions and short-range correlation probabilities in =2 and =3 systems. First, we show results with phenomenological and meson-theoretic two- and thre…
Study of nucleonic matter with a consistent two- and three-body perturbative chiral interaction
L. Coraggio, J. W. Holt, N. Itaco +3
We calculate perturbatively the energy per nucleon in infinite nuclear matter with a chiral N3LO (next-to-next-to-next-to-leading order) two-body potential plus a N2LO three-body f…
Comparison between chiral and meson-theoretic nucleon-nucleon potentials through (p,p') reactions
F. Sammarruca, D. Alonso, E. J. Stephenson
We use proton-nucleus reaction data at intermediate energies to test the emerging new generation of chiral nucleon-nucleon (NN) potentials. Predictions from a high quality one-boso…
Spin polarized neutron matter within the Dirac-Brueckner-Hartree-Fock approach
F. Sammarruca, P. G. Krastev
The relation between energy and density (known as the nuclear equation of state) plays a major role in a variety of nuclear and astrophysical systems. Spin and isospin asymmetries…
Predicting the single-proton/neutron potentials in asymmetric nuclear matter
F. Sammarruca, W. Barredo, P. Krastev
We discuss the one-body potentials for protons and neutrons obtained from Dirac-Brueckner-Hartree-Fock calculations of neutron-rich matter, in particular their dependence upon the…
Relativistic Corrections to the Triton Binding Energy
F. Sammarruca, D. P. Xu, R. Machleidt
The influence of relativity on the triton binding energy is investigated. The relativistic three-dimensional version of the Bethe-Salpeter equation proposed by Blankenbecler and Su…
Microscopic in-medium nucleon-nucleon cross sections with improved Pauli blocking effects
B. Chen, F. Sammarruca, C. A. Bertulani
We present updated predictions of effective elastic nucleon-nucleon cross sections intended for use in nucleus-nucleus reactions. A novel characteristic of the present approach com…
Inclusion of non-spherical components of the Pauli blocking operator in (p,p') reactions
E. J. Stephenson, R. C. Johnson, F. Sammarruca
We present the first calculations of proton elastic and inelastic scattering in which the Pauli blocking operator contains the leading non-spherical components as well as the usual…
Microscopic calculations of medium effects for 200-MeV (p,p') reactions
F. Sammarruca, E. J. Stephenson, K. Jiang
We examine the quality of a G-matrix calculation of the effective nucleon-nucleon (NN) interaction for the prediction of the cross section and analyzing power for 200-MeV (p,p') re…
In-medium nucleon-nucleon cross-sections with non-spherical Pauli blocking
L. White, F. Sammarruca
We present a formalism to solve the Bethe-Goldstone scattering equation without the use of partial wave expansion which is alternative to the one we developed in a previous work. T…
Reduced regulator dependence of neutron-matter predictions with chiral interactions
L. Coraggio, J. W. Holt, N. Itaco +2
We calculate the energy per particle in infinite neutron matter perturbatively using chiral N3LO two-body potentials plus N2LO three-body forces. The cutoff dependence of the predi…
Comment on "Unmasking the nuclear equation of state"
F. Sammarruca
Referring to a recently published paper [J. Piekarewicz, Phys. Rev. C 69, 041301 (2004)], we point out that Dirac-Brueckner-Hartree-Fock calculations of the symmetry energy predict…