Speaker
Clayton G. Davis
(University of Maryland)
Description
Neutrinoless double-beta decay experiments search for a rare mono-energetic decay process. Their sensitivity is determined in part by their energy resolution. The EXO-200 experiment searches for neutrinoless double-beta decay of xenon-136 and has a resolution which is limited by noise in the scintillation channel. Here we present a new technique for denoising the scintillation waveforms in offline analysis, improving our time-averaged energy resolution by more than 20% to an average 1.53% sigma/E at 2458 keV. Application of this technique results in a 90% CL half-life limit of 1.1e25 years, corresponding to a Majorana mass limit of 190-450 meV. (Submitted on behalf of the EXO-200 collaboration.)
Primary author
Clayton G. Davis
(University of Maryland)