Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 87: Neutrino physics 11
T 87.1: Vortrag
Donnerstag, 7. März 2024, 16:00–16:15, Geb. 30.22: Gaede-HS
Search for the leptonic CP violation with the ESSnuSB(+) project — •Tamer Tolba — Universität Hamburg, Hamburg, Germany
The measurement of the unexpectedly high value of the third neutrino mixing angle, θ13, opened the possibility of measuring the Dirac leptonic CP violating angle, δCP, using intense neutrino beams. The European Spallation Source neutrino Super Beam (ESSνSB) is a long-baseline neutrino project that aims in measuring CPV in the leptonic sector at the second, rather than the first, of the νµ to νe oscillation maximum, where the sensitivity is ∼ 3 times higher. The use of the 5 MW proton beam of the ESS linac combined to a ∼ cubic-km Water Cherenkov detector located at the second oscillation maximum paves the way to a precise measurement of δCP. The ESSνSB CDR showed that after 10 years of data taking, more than 70% of the 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 by a large margin. The next phase of the project, the ESSνSB+, which started in 2023, aims in using the intense muon flux produced together with neutrinos to measure the neutrino-nucleus cross-section (the dominant term of the systematic uncertainty) in the energy range of 0.2 to 0.6 GeV, using a LEnuSTORM and a LEMNB facilities.
In this talk, an overview of the concluded phase and an update on the first-year design-study of the current phase of the project will be presented.
Keywords: Long-baseline; Neutrino oscillation; CP violation; ESSnuSB; second oscillation maximum