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Test of Lorentz and CPT violation with Short Baseline Neutrino Oscillation Excesses

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arxiv 1109.3480 v3 pith:GQ3AA3FL submitted 2011-09-15 hep-ex hep-ph

Test of Lorentz and CPT violation with Short Baseline Neutrino Oscillation Excesses

The MiniBooNE Collaboration: A. A. Aguilar-Arevalo , C. E. Anderson , A. O. Bazarko , S. J. Brice , B. C. Brown , L. Bugel , J. Cao , L. Coney
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J. M. Conrad D. C. Cox A. Curioni R. Dharmapalan Z. Djurcic D. A. Finley B. T. Fleming R. Ford F. G. Garcia G. T. Garvey J. Grange C. Green J. A. Green T. L. Hart E. Hawker W. Huelsnitz R. Imlay R. A. Johnson G. Karagiorgi P. Kasper T. Katori T. Kobilarcik I. Kourbanis S. Koutsoliotas E. M. Laird S. K. Linden J. M. Link Y. Liu W. C. Louis K. B. M. Mahn W. Marsh C. Mauger V. T. McGary G. McGregor W. Metcalf P. D. Meyers F. Mills G. B. Mills J. Monroe C. D. Moore J. Mousseau R. H. Nelson P. Nienaber J. A. Nowak B. Osmanov S. Ouedraogo R. B. Patterson Z. Pavlovic D. Perevalov C. C. Polly E. Prebys J. L. Raaf H. Ray B. P. Roe A. D. Russell V. Sandberg R. Schirato D. Schmitz M. H. Shaevitz F. C. Shoemaker D. Smith M. Soderberg M. Sorel P. Spentzouris J. Spitz I. Stancu R. J. Stefanski M. Sung H. A. Tanaka R. Tayloe M. Tzanov R. G. Van de Water M. O. Wascko D. H. White M. J. Wilking H. J. Yang G. P. Zeller E. D. Zimmerman
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classification hep-ex hep-ph
keywords neutrinoanti-electronappearancedataelectronlimitssiderealcoefficients
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The sidereal time dependence of MiniBooNE electron neutrino and anti-electron neutrino appearance data are analyzed to search for evidence of Lorentz and CPT violation. An unbinned Kolmogorov-Smirnov test shows both the electron neutrino and anti-electron neutrino 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 electron neutrino appearance data prefer a sidereal time-independent solution, and the anti-electron neutrino appearance data slightly prefer a sidereal time-dependent solution. Limits of order 10E-20 GeV are placed on combinations of SME coefficients. These limits give the best limits on certain SME coefficients for muon neutrino to electron neutrino and anti-muon neutrino to anti-electron neutrino oscillations. The fit values and limits of combinations of SME coefficients are provided.

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