Updated physics performance of the ESSnuSB experiment: ESSnuSB collaboration

In this paper, we present the physics performance of the ESSnuSB experiment in the standard three flavor scenario using the updated neutrino flux calculated specifically for the ESSnuSB configuration and updated migration matrices for the far detector. Taking conservative systematic uncertainties corresponding to a normalization error of 5 % for signal and 10 % for background, we find that there is 10 σ(13 σ) CP violation discovery sensitivity for the baseline option of 540 km (360 km) at δCP= ± 90 ∘. The corresponding fraction of δCP for which CP violation can be discovered at more than 5 σ is 70 %. Regarding CP precision measurements, the 1 σ error associated with δCP= 0 ∘ is around 5 ∘ and with δCP= - 90 ∘ is around 14 ∘(7 ∘) for the baseline option of 540 km (360 km). For hierarchy sensitivity, one can have 3 σ sensitivity for 540 km baseline except δCP= ± 90 ∘ and 5 σ sensitivity for 360 km baseline for all values of δCP. The octant of θ23 can be determined at 3 σ for the values of: θ23> 51 ∘ (θ23< 42 ∘ and θ23> 49 ∘) for baseline of 540 km (360 km). Regarding measurement precision of the atmospheric mixing parameters, the allowed values at 3 σ are: 40 ∘< θ23< 52 ∘ (42 ∘< θ23< 51. 5 ∘) and 2.485 × 10 - 3 eV2<2.545×10-3 eV2 (2.49 × 10 - 3 eV2<2.54×10-3 eV2) for the baseline of 540 km (360 km).