Exchange current corrections to neutrino-nucleus scattering.

Relativistic exchange current corrections to neutrino–nucleus cross sections are presented assuming non–vanishing strange quark form factors for the constituent nucleons. For charged current processes the exchange current corrections can lower the impulse approximation results by 10% while these corrections are found to be sensitive to both the nuclear density and the strange quark axial form factor of the nucleon for neutral current processes. Implications on the LSND experiment to determine this form factor are discussed. Typeset using REVTEX ∗To appear in Physical Review Letters †Present Address: Department of Physics, University of Maryland, College Park, MD 20742-4111,