Search for Lorentz and CPT violation using sidereal time dependence of neutrino flavor transitions over a short baseline

Abstract

A class of extensions of the Standard Model allows Lorentz and CPT violations, which can be identified by the observation of sidereal modulations in the neutrino interaction rate. A search for such modulations was performed using the T2K on-axis near detector. Two complementary methods were used in this study, both of which resulted in no evidence of a signal. Limits on associated Lorentz and CPT violating terms from the Standard Model Extension have been derived taking into account their correlations in this model for the first time. These results imply such symmetry violations are suppressed by a factor of more than $10^{20}$ at the GeV scale.

arXiv comment13 pages, 6 figures

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• White Paper on New Opportunities at the Next-Generation Neutrino Experiments (Part 1: BSM Neutrino Physics and Dark Matter)
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• Tests of Lorentz invariance at the Sudbury Neutrino Observatory
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• Search for Lorentz-Invariance Violation with the first KATRIN data
• Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
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• Search for Lorentz-violation through sidereal effect at NOνA Experiment
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• Closing the Neutrino "BSM Gap": Physics Potential of Atmospheric Through-Going Muons at DUNE