Final State Interaction of Neutrino-Nucleus Scattering in the Quasielastic Region

Within the framework of a relativistic single-particle model, the final state interaction is studied through neutrino-nucleus scattering in the quasielastic region. A relativistic phenomenological optical potential and a real potential are used to investigate the effect of the final state interaction. The real potential refers to no loss of flux. We calculate the total cross section for the neutral-and charged-current reactions. In particular, we calculate the neutral-current, like (nu,nu'), and charged-current reactions, like (nu(e), e(-)) and (v(mu), mu(-)), processes. We find that the effect of the filial state interaction due to the optical potential is about 45%.