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Local chiral interactions and magnetic structure of few-nucleon systems
R. Schiavilla, A. Baroni, S. Pastore +8
The magnetic form factors of H, H, and He, deuteron photodisintegration cross sections at low energies, and deuteron threshold electrodisintegration cross sections at b…
Local chiral interactions, the tritium Gamow-Teller matrix element, and the three-nucleon contact term
A. Baroni, R. Schiavilla, L. E. Marcucci +8
The Gamow-Teller (GT) matrix element contributing to tritium decay is calculated with trinucleon wave functions obtained from hyperspherical-harmonics solutions of the Schrödin…
Ab initio calculation of neutral-current -C inclusive quasielastic scattering
A. Lovato, S. Gandolfi, J. Carlson +3
Quasielastic neutrino scattering is an important aspect of the experimental program to study fundamental neutrino properties including neutrino masses, mixing angles, the mass hier…
Quantum Monte Carlo calculations of weak transitions in =6--10 nuclei
S. Pastore, A. Baroni, J. Carlson +4
Ab initio calculations of the Gamow-Teller (GT) matrix elements in the decays of He and C and electron captures in Be are carried out using both variational and…
Light-nuclei spectra from chiral dynamics
M. Piarulli, A. Baroni, L. Girlanda +8
A major goal of nuclear theory is to explain the spectra and stability of nuclei in terms of effective many-body interactions amongst the nucleus' constituents-the nucleons, i.e.,…
Variational calculation of the ground state of closed-shell nuclei up to
D. Lonardoni, A. Lovato, Steven C. Pieper +1
Variational calculations of ground-state properties of He, O, and Ca are carried out employing realistic phenomenological two- and three-nucleon potentials. The t…
Local chiral potentials and the structure of light nuclei
Maria Piarulli, Luca Girlanda, Rocco Schiavilla +6
We present fully local versions of the minimally non-local nucleon-nucleon potentials constructed in a previous paper [M.\ Piarulli {\it et al.}, Phys.\ Rev.\ C {\bf 91}, 024003 (2…
Electromagnetic response of 12C: a first-principles calculation
A. Lovato, S. Gandolfi, J. Carlson +2
The longitudinal and transverse electromagnetic response functions of C are computed in a "first-principles" Green's function Monte Carlo calculation, based on realistic two…
Ab initio calculation of the electromagnetic and neutral-weak response functions of 4He and 12C
A. Lovato, O. Benhar, J. Carlson +4
Precise measurement of neutrino oscillations, and hence the determination of their masses demands a quantitative understanding of neutrino-nucleus interactions. To this aim, two-bo…
Electromagnetic and neutral-weak response functions of 4He and 12C
A. Lovato, S. Gandolfi, J. Carlson +2
Ab initio calculations of the quasi-elastic electromagnetic and neutral-weak response functions of 4He and 12C are carried out for the first time. They are based on a realistic app…
Quantum Monte Carlo methods for nuclear physics
J. Carlson, S. Gandolfi, F. Pederiva +4
Quantum Monte Carlo methods have proved very valuable to study the structure and reactions of light nuclei and nucleonic matter starting from realistic nuclear interactions and cur…
Quantum Monte Carlo calculations of electromagnetic transitions in 8Be with meson-exchange currents derived from chiral effective field theory
S. Pastore, R. B. Wiringa, Steven C. Pieper +1
We report quantum Monte Carlo calculations of electromagnetic transitions in 8Be. The realistic Argonne v18 two-nucleon and Illinois-7 three-nucleon potentials are used to generate…
Neutral weak current two-body contributions in inclusive scattering from C
A. Lovato, S. Gandolfi, J. Carlson +2
An ab initio calculation of the sum rules of the neutral weak response functions in C is reported, based on a realistic Hamiltonian, including two- and three-nucleon potenti…
Nucleon and nucleon-pair momentum distributions in A <= 12 nuclei
R. B. Wiringa, R. Schiavilla, Steven C. Pieper +1
We report variational Monte Carlo calculations of single-nucleon momentum distributions for A <= 12 nuclei and nucleon-pair and nucleon-cluster momentum distributions for A <= 8. T…
Charge-symmetry breaking forces and isospin mixing in 8Be
R. B. Wiringa, S. Pastore, Steven C. Pieper +1
We report Green's function Monte Carlo calculations of isospin-mixing (IM) matrix elements for the 2+, 1+, and 3+ T=0,1 pairs of states at 16--19 MeV excitation in 8Be. The realist…
Charge form factor and sum rules of electromagnetic response functions in Carbon-12
A. Lovato, S. Gandolfi, Ralph Butler +4
An "ab initio" calculation of the Carbon-12 elastic form factor, and sum rules of longitudinal and transverse response functions measured in inclusive (e,e') scattering, is reporte…
Computational Nuclear Quantum Many-Body Problem: The UNEDF Project
Scott Bogner, Aurel Bulgac, Joseph A. Carlson +28
The UNEDF project was a large-scale collaborative effort that applied high-performance computing to the nuclear quantum many-body problem. UNEDF demonstrated that close association…
GFMC calculations of electromagnetic moments and M1 transitions in nuclei
S. Pastore, Steven C. Pieper, R. Schiavilla +1
We present recent Green's function Monte Carlo calculations of magnetic moments and M1 transitions in nuclei, which include corrections arising from two-body meson-excha…
Properties of trapped neutrons interacting with realistic nuclear Hamiltonians
Pieter Maris, James P. Vary, S. Gandolfi +2
We calculate properties of neutron drops in external potentials using both quantum Monte Carlo and no-core full configuration techniques. The properties of the external wells are v…
Quantum Monte Carlo calculations of electromagnetic moments and transitions in A <= 9 nuclei with meson-exchange currents derived from chiral effective field theory
S. Pastore, Steven C. Pieper, R. Schiavilla +1
Quantum Monte Carlo calculations of electromagnetic moments and transitions are reported for A <= 9 nuclei. The realistic Argonne v18 two-nucleon and Illinois-7 three-nucleon poten…
Quantum Monte Carlo calculations of magnetic moments and M1 transitions in nuclei
S. Pastore, Steven C. Pieper, R. Schiavilla +1
We present Quantum Monte Carlo calculations of magnetic moments and M1 transitions in nuclei which take into account contributions of two-body electromagnetic currents. Th…
Quantum Monte Carlo calculations of spectroscopic overlaps in nuclei
I. Brida, Steven C. Pieper, R. B. Wiringa
We present Green's function Monte Carlo calculations of spectroscopic overlaps for nuclei. The realistic Argonne v18 two-nucleon and Illinois-7 three-nucleon interaction…
Cold neutrons trapped in external fields
S. Gandolfi, J. Carlson, Steven C. Pieper
The properties of inhomogeneous neutron matter are crucial to the physics of neutron-rich nuclei and the crust of neutron stars. Advances in computational techniques now allow us t…
Quantum Monte Carlo calculations of magnetic moments and M1 transitions in A<=7 nuclei including meson-exchange currents
L. E. Marcucci, Muslema Pervin, Steven C. Pieper +2
Green's function Monte Carlo calculations of magnetic moments and M1 transitions including two-body meson-exchange current (MEC) contributions are reported for A<=7 nuclei. The rea…