Neutrino neutral reaction on 4He:: Effects of final state interaction and realistic NN force -: art. no. 048801

The inelastic neutral reaction of neutrino on He-4 is calculated microscopically, including full final state interaction among the four nucleons. The calculation is performed using the Lorentz integral transform method and the hyperspherical-harmonic effective interaction approach, with a realistic nucleon-nucleon interaction. A detailed energy dependent calculation is given in the impulse approximation. With respect to previous calculations, this work predicts an increased reaction cross section by 10-30 % for neutrino temperature up to 15 MeV.