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We study parity violation in quasielastic (QE) electron-nucleus scatteringusing the relativistic impulse approximation. Different fully relativisticapproaches have been considered to estimate the effects associated with thefinal-state interactions. We have computed the parity-violating quasielastic(PVQE) asymmetry and have analyzed its sensitivity to the different ingredientsthat enter in the description of the reaction mechanism: final-stateinteractions, nucleon off-shellness effects, current gauge ambiguities.Particular attention has been paid to the description of the weak neutralcurrent form factors. The PVQE asymmetry is proven to be an excellentobservable when the goal is to get precise information on the axial-vectorsector of the weak neutral current. Specifically, from measurements of theasymmetry at backward scattering angles good knowledge of the radiativecorrections entering in the isovector axial-vector sector can be gained.Finally, scaling properties shown by the interference $\gamma-Z$ nuclearresponses are also analyzed.

Parity violation in quasielastic electron-nucleus scattering within the relativistic impulse approximation