Physics reach of the ESSnuSB experiment

TL;DR

The ESSnuSB experiment aims to study neutrino oscillations with high sensitivity to the CP phase and mass differences, focusing on the second oscillation maximum, with updated flux and efficiency parameters.

Contribution

This paper updates the sensitivity analysis of the ESSnuSB experiment, emphasizing its capabilities in measuring neutrino oscillation parameters in the three-flavour scenario.

Findings

Excellent sensitivity to the Dirac CP phase δ_CP

Moderate sensitivity to neutrino mass hierarchy

Good sensitivity to atmospheric mass squared difference |Δm^2_31|

Abstract

ESSnuSB is a unique future proposed long-baseline experiment in Sweden to study neutrino oscillation by probing the second oscillation maximum. In this proceeding, we update the flux and efficiencies and re-calculate the sensitivity of ESSnuSB in the standard three flavour scenario. We find that it has excellent sensitivity to the Dirac CP phase $\delta_{\rm CP}$, moderate sensitivity to the mass hierarchy of the neutrinos and limited sensitivity to measure the octant of the atmospheric mixing angle $\theta_{23}$. We also find that it has a very good sensitivity to constrain the atmospheric mass squared difference $|\Delta m^2_{31}|$.