Challenges in Double Beta Decay

Table 14

SNO+	^130Te (𝑄𝛽𝛽 = 2527 keV) under construction
FWHM	∼240 keV (evaluation done on the basis of photon statistic in the scintillator [137])
MASS	163 kg of ^130Te (with 0.3% of natural Te in the liquid scintillator and a fiducial volume of ∼20% [138])
BKG
Rejection	Prompt and delayed coincidences + fiducial volume (FV)
Goal	∼3 × 10^−4 counts/(keV·kg·yr)
𝐹^0𝜈68%C.L.	2.0 × 1026 yr