Apparent CPT Violation in Neutrino Oscillation Experiments
arXiv:1002.4452 · doi:10.1103/PhysRevD.81.113001
Abstract
We consider searching for light sterile fermions and new forces by using long baseline oscillations of neutrinos and antineutrinos. A new light sterile state and/or a new force can lead to apparent CPT violation in muon neutrino and antineutrino oscillations. As an example, we present an economical model of neutrino masses containing a sterile neutrino. The potential from the Standard Model neutral current gives rise to a difference between the disappearance probabilities of neutrinos and antineutrinos, when mixing with a light sterile neutrino is considered. The addition of a B-L interaction adds coherently to the neutrino current potential and increases the difference between neutrino and antineutrino disappearance. We find that this model can improve the fit to the results of MINOS for both neutrinos and antineutrinos, without any CPT violation, and that the regions of parameter space which improve the fit are within experimental constraints.
8 pages, 3 figures, added comment about CDHS, added references
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- Gauged L_mu - L_tau and different Muon Neutrino and Anti-Neutrino Oscillations: MINOS and beyond
- Activating the 4th Neutrino of the 3+1 Scheme
- Unsolved problems in particle physics
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- MINOS Anomaly as A Signal of Lorentz Violation
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