17–21 Jul 2023
Niels Bohr Institute
Europe/Copenhagen timezone
Zoom room: https://ucph-ku.zoom.us/j/66810127842?pwd=ZDVPVWV2anVtMFVkVklhcVlLUm92QT09 (password is in your e-mail)

Improving CP Measurement with THEIA and Muon Decay at Rest

19 Jul 2023, 14:30
15m
Auditorium A (NBI)

Auditorium A

NBI

Speaker

Chui-Fan Kong (Tsung-Dao Lee Institute)

Description

We explore the possibility of using the recently proposed THEIA detector to measure the $\bar \nu_\mu \rightarrow \bar \nu_e$ oscillation with neutrinos from a muon decay at rest ($\mu$DAR) source to improve the leptonic CP phase measurement. Due to its intrinsic low-energy beam, this $\mu$THEIA configuration ($\mu$DAR neutrinos at THEIA) is only sensitive to the genuine leptonic CP phase $\delta_D$ and not contaminated by the matter effect. With detailed study of neutrino energy reconstruction and backgrounds at the THEIA detector, we find that the combination with the high-energy DUNE can significantly reduce the CP uncertainty, especially around the maximal CP violation cases $\delta_D = \pm 90^\circ$. Both the $\mu$THEIA-25 with 17 kt and $\mu$THEIA-100 with 70 kt fiducial volumes are considered. For DUNE + $\mu$THEIA-100, the CP uncertainty can be better than $8^\circ$.

Primary author

Chui-Fan Kong (Tsung-Dao Lee Institute)

Presentation materials