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- Title
Initial performance of the CUORE-0 experiment.
- Authors
Artusa, D.; Avignone, F.; Azzolini, O.; Balata, M.; Banks, T.; Bari, G.; Beeman, J.; Bellini, F.; Bersani, A.; Biassoni, M.; Brofferio, C.; Bucci, C.; Cai, X.; Canonica, L.; Cao, X.; Capelli, S.; Carbone, L.; Cardani, L.; Carrettoni, M.; Casali, N.
- Abstract
CUORE-0 is a cryogenic detector that uses an array of tellurium dioxide bolometers to search for neutrinoless double-beta decay of $$\mathrm {^{130}Te}$$ . We present the first data analysis with $$7.1 \,\mathrm {kg\cdot y}$$ of total $$\mathrm {TeO_2}$$ exposure focusing on background measurements and energy resolution. The background rates in the neutrinoless double-beta decay region of interest (2.47 to $$2.57 \,\mathrm {MeV}$$ ) and in the $$\alpha $$ background-dominated region (2.70 to $$3.90\,\mathrm {MeV}$$ ) have been measured to be $${0.071\pm 0.011}$$ and $${0.019\pm 0.002}\,\mathrm {counts/(keV\cdot kg\cdot y)}$$ , respectively. The latter result represents a factor of 6 improvement from a predecessor experiment, Cuoricino. The results verify our understanding of the background sources in CUORE-0, which is the basis of extrapolations to the full CUORE detector. The obtained energy resolution (full width at half maximum) in the region of interest is $$5.7\,\mathrm {keV}$$ . Based on the measured background rate and energy resolution in the region of interest, CUORE-0 half-life sensitivity is expected to surpass the observed lower bound of Cuoricino with one year of live time.
- Subjects
CRYOGENICS; BOLOMETERS; NEUTRINOLESS double beta decay; DATA analysis; DETECTORS; SENSITIVITY analysis
- Publication
European Physical Journal C -- Particles & Fields, 2014, Vol 74, Issue 8, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-014-2956-6