Limits on electron neutrino disappearance from the KARMEN and LSND νe-carbon cross section data

Abstract

This paper presents a combined analysis of the KARMEN and LSND ν[subscript e]-carbon cross section measurements within the context of a search for ν[subscript e] disappearance at high Δm[superscript 2]. KARMEN and LSND were located at 17.7 m and 29.8 m, respectively, from the neutrino source, so, the consistency of the two measurements, as a function of antineutrino energy, sets strong limits on neutrino oscillations. Most of the allowed region from the ν[subscript e] disappearance analysis of the Gallium calibration data is excluded at >95% CL and the best-fit point is excluded at 3.6σ. Assuming CPT conservation, comparisons are also made to the oscillation analyses of reactor antineutrino data.