论文标题
通过Theia和Muon衰减在休息时改善CP测量
Improving CP Measurement with THEIA and Muon Decay at Rest
论文作者
论文摘要
我们探讨了使用最近提出的Theia检测器测量$ \ barν_μ\ rightArrow \barν_e$振荡与中微子的振荡，从静止的muon衰减（$μ$ dar）来源（$μ$ dar）来改善Leptonic CP相测量。由于其固有的低能光束，这种$μ$ theia的配置（$μ$ dar Neutrinos在Theia）仅对真正的Leptonic CP相$δ_d$敏感，而不会受到物质效应的污染。通过详细研究中微子能量重建和Theia探测器的背景，我们发现与高能源沙丘的组合可以显着降低CP的不确定性，尤其是围绕最大CP违规案例，$Δ_D= \ pm 90^\ circ $。均考虑了$μ$ $ $ THEIA-25，具有17kt和$μ$ $ $ THEIA-100，带有70kt的基准量。对于沙丘 + $ $ $ theia-100，CP的不确定性可以大于$ 8^\ circ $。
We explore the possibility of using the recently proposed THEIA detector to measure the $\bar ν_μ\rightarrow \bar ν_e$ oscillation with neutrinos from a muon decay at rest ($μ$DAR) source to improve the leptonic CP phase measurement. Due to its intrinsic low-energy beam, this $μ$THEIA configuration ($μ$DAR neutrinos at THEIA) is only sensitive to the genuine leptonic CP phase $δ_D$ 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 $δ_D = \pm 90^\circ$. Both the $μ$THEIA-25 with 17kt and $μ$THEIA-100 with 70kt fiducial volumes are considered. For DUNE + $μ$THEIA-100, the CP uncertainty can be better than $8^\circ$.
