New results from the CUORE experiment
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first cryogenic experiment searching for neutrinoless double-beta ($$0\nu\beta\beta$$) decay that has been able to reach the one-ton scale. The detector, located at the Laboratori Nazionali del Gran Sasso in Italy, consists of an array of 988 TeO$$_2$$ crystals arranged in a compact cylindrical structure of 19 towers. Following the completion of the detector construction in August 2016, CUORE began its first physics data run in 2017 at a base temperature of about 10 mK. Following multiple optimization campaigns in 2018, CUORE is currently in stable operating mode. In 2019, CUORE released its 2\textsuperscript{nd} result of the search for $$0\nu\beta\beta$$ with a TeO$$_2$$ exposure of 372.5 kg$$\cdot$$yr and a median exclusion sensitivity to a $$^{130}$$Te $$0\nu\beta\beta$$ decay half-life of $$1.7\cdot 10^{25}$$ yr. We find no evidence for $$0\nu\beta\beta$$ decay and set a 90\% C.I. (credibility interval) Bayesian lower limit of $$3.2\cdot 10^{25}$$ yr on the $$^{130}$$Te $$0\nu\beta\beta$$ decay half-life. In this work, we present the current status of CUORE's search for $$0\nu\beta\beta$$, as well as review the detector performance. Finally, we give an update of the CUORE background model and the measurement of the $$^{130}$$Te two neutrino double-beta ($$2\nu\beta\beta$$) decay half-life.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Istituto Nazionale di Fisica Nucleare (INFN); Alfred P. Sloan Foundation; Yale University
- Contributing Organization:
- CUORE Collaboration
- Grant/Contract Number:
- AC02-05CH11231; NSF-PHY-0605119; NSF-PHY-0500337; NSF-PHY-0855314; NSF-PHY-0902171; NSF-PHY-0969852; NSF-PHY1307204; NSF-PHY-1404205; AC52-07NA27344; FG02-08ER41551; FG03-00ER41138; SC0011091; SC0012654
- OSTI ID:
- 1788016
- Alternate ID(s):
- OSTI ID: 1725812
- Journal Information:
- PoS - Proceedings of Science, Vol. 390, Issue 1; Conference: 40. International Conference on High Energy physics, Prague (held virtually), 28 Jul -6 Aug 2020; ISSN 1824-8039
- Publisher:
- SISSACopyright Statement
- Country of Publication:
- United States
- Language:
- English
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