PROSPECT-II Oscillation Physics Goals and Beyond*

The Precision Reactor Oscillation and SPECTrum, or PROSPECT, detector is designed to search for eV-scale sterile neutrino oscillation and to make a high resolution spectrum measurement. PROSPECT consists of a segment ⁶Li-doped liquid scintillator volume deployed at ~7m from the High Flux Isotope Reactor at Oak Ridge National Laboratory. Due to the degree of segmentation and the short baseline deployment, the PROSPECT detector is excellent to probe mass-splitting between 0.1-10 eV². While PROSPECT has set stringent new limits on sterile neutrinos in this mass splitting range, physically relevant parameter space remains unaddressed. An evolutionary upgrade of PROSPECT detector is in progress that will provide an improved spectrum measurement and will significantly exceed the current sensitivity in oscillation parameter space. This talk will focus on PROSPECT-II oscillation sensitivity and the possible impact of additional future deployments.