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- R Schiavilla, I Sick
- 2001

The neutron charge form factor G En (q) is determined from an analysis of the deuteron quadrupole form factor F C2 (q) data. Recent calculations, based on a variety of different model interactions and currents, indicate that the contributions associated with the uncertain two-body operators of shorter range are relatively small for F C2 (q), even at large… (More)

- R Schiavilla, R B Wiringa, Steven C Pieper, J Carlson
- Physical review letters
- 2007

Two-nucleon momentum distributions are calculated for the ground states of nuclei with mass number A< or =8, using variational Monte Carlo wave functions derived from a realistic Hamiltonian with two- and three-nucleon potentials. The momentum distribution of np pairs is found to be much larger than that of pp pairs for values of the relative momentum in… (More)

- A Lovato, S Gandolfi, J Carlson, Steven C Pieper, R Schiavilla
- Physical review letters
- 2014

An ab initio calculation of the sum rules of the neutral weak response functions in 12C is reported, based on a realistic Hamiltonian, including two- and three-nucleon potentials, and on realistic currents, consisting of one- and two-body terms. We find that the sum rules of the response functions associated with the longitudinal and transverse components… (More)

- R. Schiavilla
- 2008

We investigate parity-violating observables in the np system, including the longitudinal asymmetry and neutron-spin rotation in np elastic scattering, the photon asymmetry in np radiative capture, and the asymmetries in deuteron photo-disintegration d(γ, n)p in the threshold region and electro-disintegration d(e, e ′)np in quasi-elastic kinematics. To have… (More)

- L E Marcucci, A Kievsky, S Rosati, R Schiavilla, M Viviani
- Physical review letters
- 2012

The muon-capture reactions {2}H(μ{-},ν{μ})nn and {3}He(μ{-},ν{μ}){3}H are studied with nuclear potentials and charge-changing weak currents, derived in chiral effective field theory. The low-energy constants (LECs) c{D} and c{E}, present in the three-nucleon potential and (c{D}) axial-vector current, are constrained to reproduce the A=3 binding energies and… (More)

We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from the deuteron at backward angles at Q2=0.038 (GeV/c)2. This quantity provides a determination of the neutral weak axial vector form factor of the nucleon, which can potentially receive large electroweak corrections. The measured asymmetry A=-3.51+/-0.57… (More)

- R. Schiavilla
- 2000

Our current understanding of the structure of nuclei with A ≤ 8, including energy spectra, electromagnetic form factors, and capture reactions, is critically reviewed within the context of a realistic approach to nuclear dynamics based on two-and three-nucleon interactions and associated electromagnetic currents.

- L Girlanda, A Kievsky, L E Marcucci, S Pastore, R Schiavilla, M Viviani
- Physical review letters
- 2010

We report on a study of the nd and n(3)He radiative captures at thermal neutron energies, using wave functions obtained from either chiral or conventional two- and three-nucleon realistic potentials with the hyperspherical-harmonics method, and electromagnetic currents derived in chiral effective field theory up to one loop. The predicted nd and n(3)He… (More)

For simple models of the nuclear charge operator, measurements of the Coulomb sum and the charge form factor of a nucleus directly determine the proton-proton correlations. We examine experimental results obtained for few-body nuclei at Bates and Saclay using models of the charge operator that include both one-and two-body terms. Previous analyses using… (More)

- M J Musolf, R Schiavilla, T W Donnelly
- 1994

Meson-exchange current (MEC) contributions to the parity-violating (PV) asymmetry for elastic scattering of polarized electrons from 4 He are calculated over a range of momentum transfer using Monte Carlo methods and a variational 4 He ground state wavefunction. The results indicate that MEC's generate a negligible contribution to the asymmetry at low-| q|,… (More)