Improvements on perturbative oscillation formulas including non-standard neutrino Interactions

Abstract

We present perturbative oscillation probabilities for electron and muon channels including non-standard interaction (NSI) effects. The perturbation was performed in standard parameters $\Delta m_{21}^2/\Delta m_{31}^2$ and ${\sin }^2({\theta }_{13})$ as in non-standard interaction couplings. Our goal is to match non-standard parameters with the standard ones. This leads to oscillation probabilities with NSI compact and with functional structure similar to the Standard Oscillation (SO) case. Such formalism allows us to recognize degeneracies between standard oscillation parameters and NSI parameters. In such scenario, we also have an educated guess about the origin of the reported behavior of long-baseline experiments degeneracies, which should be due to marginalization on standard oscillation parameters ${\delta }_{\mathrm{CP}}$, ${\theta }_{23}$ and NSI parameters.

arXiv comment19 pages, 5 figures

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