Journal Article

Search for Majorana neutrinos exploiting millikelvin cryogenics with CUORE

Benato, G., Clemenza, M., Liu, R., Johnston, J., Sakai, M., Pira, C., Schmidt, B., Speller, D., Alduino, C., Chiesa, D., Bucci, C., Celi, E., Pavan, M., Fujikawa, B. K., Rosenfeld, C., Sisti, M., Camilleri, J., Singh, V., Beretta, M., Avignone, F. T., Huang, R. G., Giuliani, A., Carniti, P., Freedman, S. J., Ma, L., Puiu, A., Fu, S. H., Alfonso, K., Ouellet, J. L., Moggi, N., Creswick, R. J., Nastasi, M., Sharma, V., Cardani, L., Pagliarone, C. E., Copello, S., Di Domizio, S., Morganti, S., Cao, X. G., Cappelli, L., Fang, D. Q., Nones, C., Giachero, A., Capelli, S., Dell’Oro, S., Pettinacci, V., Fiorini, E., Pallavicini, M., Canonica, L., Gironi, L., Pozzi, S., D’Addabbo, A., Nucciotti, A., Ligi, C., Napolitano, T., Cremonesi, O., Gotti, C., Brofferio, C., Ferri, E., Sangiorgio, S., Caminata, A., O’Donnell, T., Pessina, G., Gutierrez, T. D., Pagan, S., Bellini, F., Scielzo, N. D., Pagnanini, L., Ma, Y. G., Maruyama, R. H., Azzolini, O., Dafinei, I., Previtali, E., Bari, G., Branca, A., Campani, A., Han, K., Hansen, E. V., Adams, D. Q., Norman, E. B., Nikkel, J., Biassoni, M., Fantini, G., Kolomensky, Yu. G., Pirro, S., Pattavina, L., Rusconi, C., Ferroni,

2022

Overview

The possibility that neutrinos may be their own antiparticles, unique among the known fundamental particles, arises from the symmetric theory of fermions proposed by Ettore Majorana in 1937 1 . Given the profound consequences of such Majorana neutrinos, among which is a potential explanation for the matter–antimatter asymmetry of the universe via leptogenesis 2 , the Majorana nature of neutrinos commands intense experimental scrutiny globally; one of the primary experimental probes is neutrinoless double beta (0 νββ ) decay. Here we show results from the search for 0 νββ decay of 130 Te, using the latest advanced cryogenic calorimeters with the CUORE experiment 3 . CUORE, operating just 10 millikelvin above absolute zero, has pushed the state of the art on three frontiers: the sheer mass held at such ultralow temperatures, operational longevity, and the low levels of ionizing radiation emanating from the cryogenic infrastructure. We find no evidence for 0 νββ decay and set a lower bound of the process half-life as 2.2 × 10 25  years at a 90 per cent credibility interval. We discuss potential applications of the advances made with CUORE to other fields such as direct dark matter, neutrino and nuclear physics searches and large-scale quantum computing, which can benefit from sustained operation of large payloads in a low-radioactivity, ultralow-temperature cryogenic environment. The CUORE experiment finds no evidence for neutrinoless double beta decay after operating a large cryogenic TeO 2 calorimeter stably for several years in an extreme low-radiation environment at a temperature of 10 millikelvin.

• Publisher: Nature Publishing Group UK,Nature Publishing Group
• Subject: 639/766/387/1126 / 639/766/419/1131 / Absolute zero / Antimatter / Antiparticles / Beta decay / Collaboration / Cooling / Cosmic rays / Cryogenic temperature / Dark matter / Decay / Elementary particles / Experimental nuclear physics / Experimental particle physics / Fermions / Half-life / Heat / Humanities and Social Sciences / Ionizing radiation / Low temperature / Lower bounds / multidisciplinary / Neutrinos / Noise / Nuclear physics / Payloads / Physics / Quantum computing / Radiation / Radioactive half-life / Radioactivity / Science / Science (multidisciplinary) / Sensors