Description
ESSnuSB (the European Spallation Source neutrino Super Beam) is a design study for a Long Baseline (LBL) neutrino experiment to precisely measure the CP violation in the lepton sector, at the second neutrino oscillation maximum, using a beam driven by the uniquely powerful ESS proton linear accelerator in Lund, Sweden, a near detector suite and two large underground water Cherenkov detectors of a total fiducial volume 540,000 m3, located 360 Km north of Lund. The ESSnuSB Conceptual Design Report showed that after 10 years of running, about 72% of the possible CP-violating phase, δCP, range will be covered with 5σ C.L. to reject the no-CP-violation hypothesis. The expected precision for δCP is better than 8° for all δCP values, making it the most precise proposed experiment in the field. The ESSnuSB collaboration is currently working on the extension project, the ESSnuSB+, which aims in designing two new facilities, a Low Energy nuSTORM and a Low Energy Monitored Neutrino Beam to be used to precisely measure the neutrino-nucleus cross-section in the energy range of 0.2–0.6 GeV. A new water Cherenkov detector will also be designed to measure cross sections and also serve to explore the sterile neutrino case in a Short Baseline (SBL) experiment. An overall status of the project is presented together with the ESSnuSB+ additions.
