Oct 23 – 27, 2023
Istituto Veneto di Scienze, Lettere ed Arti
Europe/Rome timezone
opening day available in streaming on the YouTube channel of the Physics and Astronomy Dpt. of the University of Padova: https://youtu.be/t_9s2ALOFGQ

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

Oct 25, 2023, 5:20 PM
20m
Palazzo Franchetti (Istituto Veneto di Scienze, Lettere ed Arti)

Palazzo Franchetti

Istituto Veneto di Scienze, Lettere ed Arti

Campo S. Stefano, 2945 S.Marco, Venezia
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.

Primary author

Antonio Palazzo (Istituto Nazionale di Fisica Nucleare)

Co-author

Sabya Sachi Chatterjee (IPhT CEA-Saclay)

Presentation materials