Neutrino physics with KARMEN

The KARMEN experiment at the pulsed neutron facility ISIS is investigating neutrino-nucleus reactions and neutrino oscillations. In this paper we present cross sections for neutrino induced charged and neutral current reactions on 12C. These results allow a precision test of the standard model of weak interaction by imposing new limits on the neutral current isovector axial vector coupling strength βA, the strength parameter ρ measuring the universality of W± and Z0 coupling in the low energy regime and by investigating the Lorentz structure of muon decay. Neutrino oscillations ν over-bar μ -> ν over-bar e are investigated in the appearance mode by looking for p(ν over-bar e, e+)n reactions. An analysis of 3 years running time with the KARMEN2 setup reveals no indication of an oscillation signal excluding most parts of the LSND oscillation evidence.