Status of the European Spallation Source neutrino Super Beam

International audienceThe measured relatively high value of $\theta_{13}$ in 2012 privileges the 2nd neutrino oscillation maximum for the discovery of CP violation in the leptonic sector instead of the usually used 1st oscillation maximum.At the 2nd oscillation maximum the importance of systematic errors is significantly less while the sensitivity to CP violation is about three times higher than for the 1st oscillation maximum.Compared to the 1st oscillation maximum, for the same neutrino energy, the far detector has to be placed in a distance about three times longer than for the 1st oscillation maximum.For this a very intense neutrino beam is necessary.The European Spallation Source under construction, will have a proton linac of 5 MW power and 2 GeV energy.This linac, on top of neutron production, has the potential to also produce the world's most intense neutrino beam with very high potential to discover a neutrino CP violation.Here, the physics performance of this neutrino Super Beam has been evaluated considering a megaton underground Water Cherenkov detector installed at a distance of about 500 km from ESS.The choice of the detector will extent the physics program to proton decay, atmospheric neutrinos and astrophysics studies.The ESS proton linac upgrades, the accumulator ring needed for proton pulse compression, the target station optimization and the physics potential are described.This facility will also produce at the same time a copious number of muons which could be used after by a Neutrino Factory or a muon collider.The ESS neutron facility will be fully ready by 2025 at which moment the upgrades for the neutrino facility could start