XX International Workshop on Neutrino Telescopes

Impact of light sterile neutrinos on the interpretation of NOvA and T2K results

25 Oct 2023, 17:20

20m

Palazzo Franchetti (Istituto Veneto di Scienze, Lettere ed Arti)

Contributed Parallel Talk Neutrino Properties Neutrino Properties

Speaker

Antonio Palazzo (Istituto Nazionale di Fisica Nucleare)

Description

We study in detail the impact of a light sterile neutrino on the interpretation of the recent data of the long baseline experiments NO$\nu$A and T2K, assessing the robustness/fragility of the estimates of the standard 3-flavor parameters with respect to the perturbations induced in the 3+1 scheme. We find that all the basic features of the 3-flavor analysis, including the weak indication ($\sim$1.4$\sigma$) in favor of the inverted neutrino mass ordering, the preference for values of the CP-phase ${\delta }_{13}\sim 1.2\pi$, and the substantial degeneracy of the two octants of ${\theta }_{23}$, all remain basically unaltered in the 4-flavor scheme. Our analysis also demonstrates that it is possible to attain some constraints on the new CP-phase ${\delta }_{14}$. Finally, we point out that, differently from non-standard neutrino interactions, light sterile neutrinos are not capable to alleviate the tension recently emerged between NO$\nu$A and T2K in the appearance channel.

Presentation materials

L20231025_173358.jpg

Neutel_2023_palazzo_proceedings.pdf

Zenodo DOI link