Allowing electron-tau non-standard neutrino interactions in the T2K and NOvA data removes the preference for normal mass ordering and even creates a mild preference for inverted ordering.
Constraining the non-standard interaction parameters in long baseline neutrino experiments
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abstract
In this article we investigate the prospects for probing the strength of the possible non-standard neutrino interactions (NSI) in long baseline neutrino oscillation experiments. We find that these experiments are sensitive to NSI couplings down to the level of 0.01-0.1 depending on the oscillation channel and the baseline length, as well as on the detector's fiducial mass. We also investigate the interference of the leptonic CP angle $\delta_{CP}$ with the constraining of the NSI couplings. It is found that the interference is strong in the case of the $\nu_{e}\leftrightarrow\nu_{\mu}$ and $\nu_{e}\leftrightarrow\nu_{\tau}$ transitions but not significant in other transitions. In our numerical analysis we apply the GLoBES software and use the LBNO setup as our benchmark.
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2019 1verdicts
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Neutrino mass ordering obscured by non-standard interactions
Allowing electron-tau non-standard neutrino interactions in the T2K and NOvA data removes the preference for normal mass ordering and even creates a mild preference for inverted ordering.