Ricerc@Sapienza

TeO2bolometers have been used for many years to search for neutrinoless double beta decay in130Te. CUORE, a tonne-scale TeO2detector array, recently published the most sensitive limit on the half-life, > 1.5 × 1025yr, which corresponds to an upper bound of 140-400 meV on the effective Majorana mass of the neutrino. While it makes CUORE a world-leading experiment looking for neutrinoless double beta decay, it is not the only study that CUORE will contribute to in the field of nuclear and particle physics.

Bolometers are cryogenic calorimeters which feature excellent energy resolution, low energy threshold, high detection efficiency, flexibility in choice of materials, particle identification capability if operated as hybrid devices. After 30 years of rapid progresses, they represent nowadays a leading technology in several fields: particle and nuclear physics, X-ray astrophysics, cosmology. However, further and substantial developments are required to increase the sensitivity to the levels envisioned by future researches.

The CUORE experiment, a ton-scale cryogenic bolometer array, recently began operation at the Laboratori Nazionali del Gran Sasso in Italy. The array represents a significant advancement in this technology, and in this work we apply it for the first time to a high-sensitivity search for a lepton-number-violating process: Te-130 neutrinoless double-beta decay.

We present the search for Lorentz violation in the double beta decay of 82Se with CUPID-0, using an
exposure of 9.95 kg × yr. We found no evidence for the searched signal and set a limit on the isotropic components of the Lorentz violating coefficient of a? ð3Þ < 4.1 × 10?6 GeV (90% credible interval). This of results is obtained with a Bayesian analysis of the experimental data and fully includes the systematic uncertainties of the model. This is the first limit on a? ð3Þ obtained with a scintillating bolometer, showing the of
potentiality of this technique