Sensitivity of nEXO to (^{136})Xe Charged-Current Interactions: Background-free Searches for Solar Neutrinos and Fermionic Dark Matter
Published in PRD (Submitted), 2025
Isomeric states of \(^{136}\)Cs create a unique time-delayed coincident signal in LXe TPCs, which can be used for background rejection on the order of \(10^{-9}\), enabling background-free measurements of solar neutrinos and electron-coupling fermionic dark matter.