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 ν¯e at the level of ∼1023/year, close to a kiloton-scale neutrino detector in order to gain sensitivity to very short-baseline neutrino oscillations (ν¯e→ν¯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; ν¯e+p→e++n), including initial-state wave packet effects, and the weak mixing angle (via elastic scattering off atomic electrons, ν¯e+e-→ν¯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 νeν¯e.