Short-baseline oscillation scenarios at JUNO and TAO

TL;DR

This paper evaluates JUNO and TAO's sensitivity to new physics scenarios like Large Extra Dimensions and light sterile neutrinos, showing they can set competitive bounds and potentially distinguish these models.

Contribution

It provides the first detailed sensitivity analysis of JUNO and TAO for LED and 3+1 sterile neutrino scenarios, including parameter measurement and model discrimination.

Findings

JUNO+TAO can set bounds comparable to MINOS, DUNE, or KATRIN for LED.

They can measure LED parameters with precision similar to standard oscillations.

JUNO+TAO can test most of the Gallium anomaly favored parameter space.

Abstract

We study the sensitivity of JUNO and TAO to the oscillations induced by two well-motivated scenarios beyond the standard model: Large Extra Dimensions (LED) and light sterile neutrinos in the context of 3+1 neutrino mixing. We find that JUNO+TAO can set competitive bounds on the parameter space of each scenario. In particular, we find that JUNO+TAO can be competitive with MINOS, DUNE or KATRIN in the context of LED. If LED are present in nature, we show that the parameters could be measured with a similar precision as the standard oscillation parameters. We also show that JUNO+TAO can test nearly all of the parameter space preferred by Gallium experiments in the context of 3+1 mixing. Finally, we discuss the possibility to distinguish the two scenarios from each other.