Search for Lorentz invariance and CPT violation with muon antineutrinos in the MINOS Near Detector
P. Adamson, D. S. Ayres, G. Barr, M. Bishai, A. Blake, G. J. Bock, D., J. Boehnlein, D. Bogert, S. V. Cao, S. Cavanaugh, S. Childress, J. A. B., Coelho, L. Corwin, D. Cronin-Hennessy, I. Z. Danko, J. K. de Jong, N. E., Devenish, M. V. Diwan, C. O. Escobar, J. J. Evans, E. Falk
TL;DR
This study searched for sidereal variations in muon antineutrino interactions at MINOS to test Lorentz invariance and CPT symmetry, finding no significant effects and setting upper limits on related theoretical coefficients.
Contribution
It provides new constraints on Lorentz and CPT violation coefficients by analyzing antineutrino data and combining it with previous neutrino results.
Findings
No significant sidereal modulation detected
Set upper limits on Lorentz and CPT violation coefficients
Combined analysis with neutrino data enhances constraints
Abstract
We have searched for sidereal variations in the rate of antineutrino interactions in the MINOS Near Detector. Using antineutrinos produced by the NuMI beam, we find no statistically significant sidereal modulation in the rate. When this result is placed in the context of the Standard Model Extension theory we are able to place upper limits on the coefficients defining the theory. These limits are used in combination with the results from an earlier analysis of MINOS neutrino data to further constrain the coefficients.
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