Discrimination of electronic recoils from nuclear recoils in two-phase xenon time projection chambers

Understand

We present a comprehensive analysis of electronic recoil vs.

• nuclear recoil discrimination in liquid/gas xenon time projection chambers, using calibration data from the 2013 and 2014-16 runs of the Large Underground Xenon (LUX) experiment.
• We observe strong charge-to-light discrimination enhancement with increased event energy.
• For events with S1 = 120 detected photons, i.e.