The European Spallation Source neutrino Super Beam plus Project

The European Spallation Source neutrino Super Beam (ESSnuSB) is a design study for a long- baseline neutrino experiment to measure the CP violation in the leptonic sector at the second neutrino oscillation maximum using a neutrino beam driven by the uniquely powerful ESS linear accelerator. The reduced impact of systematic errors on sensitivity at the second maximum allows for a very precise measurement of the CP violating parameter. The ESSnuSB CDR showed that after 10 years of data taking, more than 70% of the possible CP-violating phase, 𝛿CP, range will be covered with 5𝜎 C.L. to reject the no-CP-violation hypothesis. The expected value of 𝛿CP precision is smaller than 8◦ for all 𝛿CP values, making it the most precise proposed experiment in the field by a large margin. The recently started extension project, the ESSnuSB+, aims in designing two new facilities, a Low Energy nuSTORM (LEnuSTORM) and a Low Energy Monitored Neutrino Beam (LEMNB) to use them to precisely measure the neutrino-nucleus cross-section (the dominant term of the systematic uncertainty) in the energy range of 0.2 – 0.6 GeV. *** Topics on Astroparticle and Underground Physics *** *** 28𝑡 ℎ 𝐴𝑢𝑔𝑢𝑠𝑡 − 1𝑠𝑡 𝑆𝑒 𝑝𝑡𝑒𝑚𝑏𝑒𝑟2023 ∗ ∗ ∗ *** University of Vienna, Vienna, Austria *** ∗Speaker © Copyright owned by the author(s) under the terms of the Creative Commons