The current status of the UCNProBe experiment.

The UCNProBe experiment aims to resolve the puzzle in the large discrepancy between neutron lifetime measured by the two distinct experimental techniques. In one method, the remaining neutrons in a UCN trap are counted after some storage time, and in the other, one of the decay particles, protons, are counted in a well-calibrated neutron beam. One possible explanation for this inconsistency is that a fraction of neutrons decays into beyond-Standard Model particles instead of protons. The UCNProBe experiment will employ a novel method to measure the proton branching ratio of neutron decay. A deuterated scintillator box will be used as a UCN storage volume and to detect electrons from the neutron decay. The current status of the UCNProBe experiment will be presented.