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Title: CUORE-0 results and prospects for the CUORE experiment

With 741 kg of TeO{sub 2} crystals and an excellent energy resolution of 5 keV (0.2%) at the region of interest, the CUORE (Cryogenic Underground Observatory for Rare Events) experiment aims at searching for neutrinoless double beta decay of {sup 130}Te with unprecedented sensitivity. Expected to start data taking in 2015, CUORE is currently in an advanced construction phase at LNGS. CUORE projected neutrinoless double beta decay half-life sensitivity is 1.6 × 10{sup 26} y at 1σ (9.5 × 10{sup 25} y at the 90 % confidence level), in five years of live time, corresponding to an upper limit on the effective Majorana mass in the range 40–100 meV (50–130 meV). Further background rejection with auxiliary bolometric detectors could improve CUORE sensitivity and competitiveness of bolometric detectors towards a full analysis of the inverted neutrino mass hierarchy. CUORE-0 was built to test and demonstrate the performance of the upcoming CUORE experiment. It consists of a single CUORE tower (52 TeO{sub 2} bolometers of 750 g each, arranged in a 13 floor structure) constructed strictly following CUORE recipes both for materials and assembly procedures. An experiment its own, CUORE-0 is expected to reach a sensitivity to the ββ(0ν) half-life of {sup 130}Te aroundmore » 3×10{sup 24} y in one year of live time. We present an update of the data, corresponding to an exposure of 18.1 kg y. An analysis of the background indicates that the CUORE performance goal is satisfied while the sensitivity goal is within reach.« less
Authors:
; ; ; ; ; ;  [1] ;  [2] ;  [3] ; ; ; ; ; ;  [2] ; ; ; ; ;  [4] more »;  [5] ; « less
  1. INFN - Sezione di Milano Bicocca, Milano I-20126 - Italy (Italy)
  2. Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208 - USA (United States)
  3. (L’Aquila) I-67010 - Italy (Italy)
  4. INFN - Laboratori Nazionali di Legnaro, Legnaro (Padova) I-35020 - Italy (Italy)
  5. INFN - Laboratori Nazionali del Gran Sasso, Assergi (L’Aquila) I-67010 - Italy (Italy)
Publication Date:
OSTI Identifier:
22490667
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1666; Journal Issue: 1; Conference: Neutrino 2014: 26. international conference on neutrino physics and astrophysics, Boston, MA (United States), 2-7 Jun 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BOLOMETERS; DEAD TIME; DOUBLE BETA DECAY; ENERGY RESOLUTION; HALF-LIFE; KEV RANGE; MEV RANGE; MULTIPARTICLE SPECTROMETERS; NEUTRINO DETECTION; NEUTRINOS; PARTICLE IDENTIFICATION; SENSITIVITY; TELLURIUM 130; TELLURIUM OXIDES; UNDERGROUND