Search for New Physics With an Invariant Mass of 10-20 MeV at ARIEL*

Reported anomalies in ⁴He and ⁸Be transitions, along with the disagreement between calculation and measured values of muonic g-2, which have been recently reiterated by the Fermliab g-2 experiment, have heightened interest in a potential new particle near 17 MeV. To be compatible with current limits, this particle would need to be proto-phobic, and hence suppressed in hadronic production. Leptonic searches, such as production and decay in electron-nucleus scattering, eX -> eXA' -> eXee⁺, can test leptonic couplings directly. As the first step toward mounting such a search, the DarkLight collaboration has installed a test chamber in TRIUMF's ARIEL accelerator.   The status of these beam tests will be discussed, as will details of the spectrometer that will be installed in the next stages of the experiment along with its expected sensitivities to new physics.