Neutrino Physics Opportunities with the IsoDAR Source at Yemilab

Abstract

IsoDAR seeks to place a high-power-cyclotron and target combination, as an intense source of ${\bar{\nu }}_e$ at the level of $\sim 10^{23}$/year, close to a kiloton-scale neutrino detector in order to gain sensitivity to very short-baseline neutrino oscillations (${\bar{\nu }}_e\to {\bar{\nu }}_e$) and perform precision tests of the weak interaction, among other physics opportunities. Recently, IsoDAR has received preliminary approval to be paired with the 2.26~kton target volume liquid scintillator detector at the Yemi Underground Laboratory (Yemilab) in Korea, at a 17~m center-to-center baseline, and cavern excavation for IsoDAR is now complete. In this paper, we present the physics capabilities of IsoDAR@Yemilab in terms of sensitivity to oscillations (via inverse beta decay, IBD; ${\bar{\nu }}_e+p\to e^{+}+n$), including initial-state wavepacket effects, and the weak mixing angle (via elastic scattering off atomic electrons, ${\bar{\nu }}_e+e^{-}\to {\bar{\nu }}_e+e^{-}$). We also introduce a study of IsoDAR sensitivity to new particles, such as a light $X$ boson, produced in the target that decays to ${\nu }_e{\bar{\nu }}_e$.

17 pages, 16 figures; this version presents a number of new physics topics and studies

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• Dark sectors in neutron-shining-through-a-wall and nuclear absorption signals
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