Role of the final-state interaction and three-body force on the longitudinal response function of 4He.
We present an ab initio calculation of the longitudinal electron scattering response function off 4He with two- and three-nucleon forces and compare to experimental data. The full four-body continuum dynamics is considered via the Lorentz integral transform method. The importance of the final-state interaction is shown at various energies and momentum transfers q. The three-nucleon force reduces the quasielastic peak by 10% for q between 300 and 500 MeV/c. Its effect increases significantly at lower q, up to about 40% at q=100 MeV/c. At very low q, however, data are missing.
Bacca
Sonia
S
TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C. V6J 2A3, Canada.
Barnea
Nir
N
Leidemann
Winfried
W
Orlandini
Giuseppina
G