The sidereal time dependence of MiniBooNE νe and ν̄e appearance data is analyzed to search for evidence of Lorentz and CPT violation. An unbinned Kolmogorov-Smirnov (K-S) test shows both the νe and ν̄e appearance data are compatible with the null sidereal variation hypothesis to more than 5%. Using an unbinned likelihood fit with a Lorentz-violating oscillation model derived from the Standard Model Extension (SME) to describe any excess events over background, we find that the νe appearance data prefer a sidereal time-independent solution, and the ν̄e appearance data slightly prefer a sidereal time-dependent solution. Limits of order 10-20GeV are placed on combinations of SME coefficients. These limits give the best limits on certain SME coefficients for νμ→νe and ν̄μ→ν̄e oscillations. The fit values and limits of combinations of SME coefficients are provided. © 2012 Elsevier B.V.
Publication Source (Journal or Book title)
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Aguilar-Arevalo, A., Anderson, C., Bazarko, A., Brice, S., Brown, B., Bugel, L., Cao, J., Coney, L., Conrad, J., Cox, D., Curioni, A., Dharmapalan, R., Djurcic, Z., Finley, D., Fleming, B., Ford, R., Garcia, F., Garvey, G., Grange, J., Green, C., Green, J., Hart, T., Hawker, E., Huelsnitz, W., Imlay, R., Johnson, R., Karagiorgi, G., Kasper, P., Katori, T., Kobilarcik, T., Kourbanis, I., Koutsoliotas, S., & Laird, E. (2013). Test of Lorentz and CPT violation with short baseline neutrino oscillation excesses. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 718 (4-5), 1303-1308. https://doi.org/10.1016/j.physletb.2012.12.020