Abstract
The European Spallation Source neutrino Super Beam (ESS𝜈SB) is a long-baseline neutrino project that will measure the CP-violation in the leptonic sector at the second, rather than the first, oscillation maximum, where the sensitivity of the experiment is ∼3 times higher. The physics simulations have shown that the ESS𝜈SB, after 10 years of data taking, will be able to cover more than 70% of the CP-violating phase, δCP , parameterrange with 5 σ C.L. to reject the no-CP-violation hypothesis. The expected measurement error of δCP is smaller than 8° for all δCP values, making it the most precise proposed experiment in the field by a large margin. The extension project, ESS𝜈SB+ to be performed between 2023 and 2026, aims in measuring the neutrino-nucleus cross-section (the dominant term of the systematic uncertainty) in the energy range of 0.2 – 0.6 GeV, using a Low Energy nuSTORM (LEnuSTORM) and a Low Energy Monitored Neutrino Beam (LEMNB) facilities.
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