SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 107: Searches – Neutrino at accelerators
T 107.6: Vortrag
Donnerstag, 23. März 2023, 16:50–17:05, HSZ/0101
The ESSνSB(+) design study: Achievements and Prospects — •Tamer Tolba — Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany
The European Spallation Source neutrino Super Beam (ESSνSB) is a long-baseline neutrino project that will be able to measure the CP-violation (CPV) in the leptonic sector at the second oscillation maximum, where the sensitivity of the experiment is close to three times compared to that at the first oscillation maximum. As shown in the recently published ESSνSB conceptual design report (CDR), the initially foreseen physics performance of the ESSνSB project has surpassed earlier expectations by covering, after 10 years of data collection, more than 70% of the range of possible CP-violating phase, δCP, values with a confidence level of more than 5σ to reject the no-CP-violation hypothesis. The expected measurement precision of the value 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 addressing the challenging task of measuring the neutrino-nucleon cross-section, which is the dominant term of the systematic uncertainty, in the energy range from 0.2 to 0.6 GeV, using a Low Energy nuSTORM (LEnuSTORM) and an ENUBET-like Low Energy Monitored Neutrino Beam (LEMNB) facilities. With the successful end of the previous design-study program and the publication of the ESSνSB CDR, an overall status of the project, as well as the recently accepted, by the Horizon-Europe program, extension project, the ESSνSB+, will be presented.