PoS - Proceedings of Science
Volume 402 - The 22nd International Workshop on Neutrinos from Accelerators (NuFact2021) - All Sessions
Resolving the NOvA and T2K tension in the presence of Neutrino Non-Standard Interactions
S.S. Chatterjee* and A. Palazzo
Full text: pdf
Published on: March 31, 2022
The current data of the two long-baseline accelerator experiments NO$\nu$A and T2K, shows a tension at more than 90$\%$ C.L. for 2 degrees of freedom, in the determination of the standard CP-phase $\delta_{\mathrm {CP}}$ in case of neutrino normal ordering (NO). NO$\nu$A measures the value close to $\delta_{\mathrm {CP}} \sim 0.8 \pi$, while T2K prefers the value of $\delta_{\mathrm {CP}} \sim 1.4 \pi$. We show that such a tension can be resolved if one hypothesizes the existence of neutral-current non-standard interactions (NSI) of neutrinos involving the flavor changing type $e-\mu$ or the $e-\tau$ sectors with couplings $|\varepsilon_{e\mu}| \sim |\varepsilon_{e\tau}|\sim 0.2$. Remarkably, our analyses show that in the presence of such NSI, both the experiments point towards the same common value of the standard CP-phase $\delta_{\mathrm {CP}} \sim 3\pi/2$, thereby indicating towards the maximal CP-violation in the standard $3\nu$ framework. We also show that the best fit values of the new CP-phases $\phi_{e\mu}$ or $ \phi_{e\tau}$ are close to $\sim 3\pi/2$, hence pointing towards the maximal CP-violation in the NSI sector.
DOI: https://doi.org/10.22323/1.402.0059
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.