\begin{document}$ \overline{\nu}^{}_e \to \overline{\nu}^{}_\mu $\end{document} and \begin{document}$ \overline{\nu}^{}_e \to \overline{\nu}^{}_\tau $\end{document} oscillations by using elastic antineutrino-electron scattering processes \begin{document}$ \overline{\nu}^{}_\alpha + e^- \to \overline{\nu}^{}_\alpha + e^- $\end{document} (for \begin{document}$ \alpha = e, \mu, \tau $\end{document}), among which the \begin{document}$ \overline{\nu}^{}_e $\end{document} events can be singled out by accurately measuring the \begin{document}$ \overline{\nu}^{}_e $\end{document} flux via the inverse beta decay \begin{document}$ \overline{\nu}^{}_e + p \to e^+ + n $\end{document}. A proof-of-concept study shows that such measurements will not only be able to test the conservation of probability for reactor antineutrino oscillations, but also offer a new possibility to probe leptonic CP violation at the one-loop level."> Towards a detection of reactor <inline-formula><tex-math id="Z-20250929213222">\begin{document}${\overline {\boldsymbol v}_{\boldsymbol e} \boldsymbol\to \overline {\boldsymbol v}_{\boldsymbol\mu} }$\end{document}</tex-math></inline-formula> and <inline-formula><tex-math id="Z-20250929213259">\begin{document}${\overline {\boldsymbol v}_{\boldsymbol e} \boldsymbol\to \overline {\boldsymbol v}_{\boldsymbol\tau} }$\end{document}</tex-math></inline-formula> oscillations with possible CP violation -
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