Physics reach of the ESSnuSB experiment

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 ${\delta }_{\mathrm{C}\mathrm{P}}$, 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 $\mathrm{\mid }\mathrm{\Delta }{m}_{31}^2\mathrm{\mid }$.