Neutrino-Nucleon Neutral Current Elastic Scattering at SciBooNE

The cross-section for neutrino-nucleon neutral current (NC) elastic scattering contains the axial vector form factor G(A)(Q(2)) as well as the electromagnetic form factors unlike electromagnetic interaction. G(A) is proportional to strange part of nucleon spin (Delta s) in the Q(2) -> 0 limit. Measurement of the NC elastic cross-section in the small Q(2) region enables us to access Delta s. Signal of NC elastic scattering is a single proton. Analysis for the single proton events using geometrical and energy deposit information on reconstructed track was performed. NC elastic scattering data sample including nu p -> nu p and nu n -> nu n is obtained. The absolute cross-section as a function of nucleon kinetic energy is reported.