Tests of Lorentz violation inν¯μ→ν¯eoscillations

Temple University, Philadelphia, Pennsylvania 19122(Dated: February 7, 2008)A recently developed Standard-Model Extension (SME) formalism for neutrino oscillations thatincludes Lorentz and CPT violation is used to analyze the sidereal time variation of the neutrinoevent excess measured by the Liquid Scintillator Neutrino Detector (LSND) experiment. The LSNDexperiment, performed at Los Alamos National Laboratory, observed an excess, consistent withneutrino oscillations, of ¯ν