Particle Discrimination in TeO$_{2}$ Bolometers using Light Detectors   read out by Transition Edge Sensors
  An active discrimination of the dominant $\alpha$-background is the prerequisite for future neutrinoless double-beta decay experiments based on TeO$_{2}$ bolometers. We investigate such $\alpha$-particle rejection in cryogenic TeO$_{2}$ bolometers by the detection of Cherenkov light. For a setup consisting of a massive TeO$_{2}$ crystal (285 g) and a separate cryogenic light detector, both using transition edge sensors as temperature sensors operated at around 10 mK, we obtain an event-by-event identification of e/$\gamma$- and $\alpha$-events. We find in the energy interval ranging from 2400 keV to 2800 keV and covering the Q-value of the neutrinoless double-beta decay of $^{130}$Te a separation of the means of the two populations of 3.7 times their width. 
K. Sch\"affner, G. Angloher, F. Bellini, N. Casali, F. Ferroni, D.   Hauff, S.S. Nagorny, L. Pattavina, F. Petricca, S. Pirr...
physics.ins-det