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Title: First Results from CUORE: A Search for Lepton Number Violation via 0 ν β β Decay of Te 130

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-numberviolating process: 130Te neutrinoless double-beta decay. Examining a total TeO 2 exposure of 86.3 kg yr, characterized by an effective energy resolution of d7.7 ± 0.5T keV FWHM and a background in the region of interest of d0.014 ± 0.002T counts=dkeV kg yrT, we find no evidence for neutrinoless double-beta decay. Including systematic uncertainties, we place a lower limit on the decay half-life of T 0ν 1/2 ( 130 Te) > 1.3 × 10 25 yr (90% C.L.); the median statistical sensitivity of this search is 7.0 × 10 24 yr. Combining this result with those of two earlier experiments, Cuoricino and CUORE-0, we find T 0ν 1/2 ( 130 Te) > 1.5 × 10 25 yr (90% C.L.), which is the most stringent limit to date on this decay. Interpreting this result as a limit on the effective Majorana neutrino mass, we find m ββ < (110 - 520) meV, where the rangemore » reflects the nuclear matrix element estimates employed.« less
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Publication Date:
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344; FG02-08ER41551; FG03-00ER41138; SC0011091; SC0012654
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 13; Related Information: © 2018 American Physical Society.; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Orgs:
CUORE Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1439231
Alternate Identifier(s):
OSTI ID: 1429558