@@ -22,7 +22,7 @@ The configuration of the CUPID-0 data processing environment on the CNAF computi
\section{The experiment}
Neutrino-less Double Beta Decay (0$\nu$DBD) is a hypothesized nuclear transition in which a nucleus decays emitting only two electrons. This process can not be accommodated in the Standard Model, as the absence of emitted neutrinos would violate the lepton number conservation.
Among the several experimental approaches proposed for the search of 0$\nu$DBD, cryogenic calorimeters (bolometers) stand out for the possibility of achieving excellent energy resolution ($\sim$0.1\%), efficiency ($\ge$80\%) and intrinsic radio-purity. Moreover, the crystals that are operated as bolometers can be grown starting from most of the 0$\nu$DBD emitters, enabling the test of different nuclei.
The state of the art of the bolometric technique is represented by CUORE, an experiment composed by 988 bolometers for a total mass of 741 kg, presently in detector commissioning phase at Laboratori Nazionali del Gran Sasso.
The state of the art of the bolometric technique is represented by CUORE, an experiment composed by 988 bolometers for a total mass of 741 kg, presently in data taking at Laboratori Nazionali del Gran Sasso.
The ultimate limit of the CUORE background suppression resides in the presence of $\alpha$-decaying isotopes located in the detector structure.
The CUPID-0 project \cite{Azzolini:2018dyb,Azzolini:2018tum} was born to overcome the actual limits. The main breakthrough of CUPID-0 is the addition of independent devices to measure the light signals emitted from scintillation in ZnSe bolometers. The different properties of the light emission of electrons and $\alpha$ particles will enable event-by-event rejection of $\alpha$ interactions, suppressing the overall background in the region of interest for 0$\nu$DBD of at least one order of magnitude.
The detector is composed by 26 ZnSe ultrapure $\sim$ 500g bolometers, enriched at 95\% in $^{82}$Se, the 0$\nu$DBD emitter, and faced to Ge disks light detector operated as bolometers.
