Relativistic Effects in Non-relativistic Calculations of Electroweak Cross Sections

In view of the growing interest in neutrino scattering with nuclei we show that it is possible to extend to relatively high energies and momentum transfers the accurate ab initio results obtained by the integral transform (IT) approach for quasi-elastic (q.e) kinematics. This is made possible by performing the calculation in a specific frame and by employing a q.e. kinematical model that helps in reducing the frame dependence. The results are validated comparing theoretical and experimental (e, e\(^\prime \)) cross sections.