New CUORICINO results and status of CUORE

Year: 2006

Authors: Cremoniesi O., Ardito R., Arnaboldi C., Artusa D.R., Avignone III F.T., Balata M., Bandac I., Barucci M., Beeman J.W., Bellini F., Brofferio C., Bucci C., Capelli S., Capozzi F., Carbone L., Cebrian S., Clemenza M., Cosmelli C., Creswick R.J., Dafinei I., De Waard A., Dolinski M., Farach H.A., Ferroni F., Fiorini E., Gargiulo C., Guardincerri E., Giuliani A., Gorla P., Gutierrez T.D., Haller E.E., Irastorza I.G., Longo E., Maier G., Maruyama R., Morganti S., Nisi S., Nones C., Norman E.B., Nucciotti A., Olivieri E., Ottonello P., Pallavicini M., Palmieri E., Pavan M., Pedretti M., Pessina G., Pirro S., Previtali E., Quiter B., Risegari L., Rosenfeld C., Sangiorgio S., Sisti M., Smith A.R., Torres L., Ventura G., Xu N., Zanotti L.

Autors Affiliation: Dipartimento di Fisica, Università di Milano-Bicocca, INFN, Milano, Italy; Dipartimento di Ingegneria Strutturale, Politecnico di Milano, Milano, Italy; Department of Physics and Astronomy, University of South Carolina, Columbia, United States; Laboratori Nazionali del Gran Sasso, Assergi (L\’Aquila), Italy; Dipartimento di Fisica, Università di Firenze, INFN, Firenze, Italy; Lawrence Berkeley National Laboratory, Berkeley, United States; Dipartimento di Fisica, Università di Roma, INFN, Roma, Italy; Laboratorio de Fisica Nuclear y Alta Energias, Universitad de Zaragoza, Zaragoza, Spain; Kamerling Onnes Laboratory, Leiden University, Leiden, Netherlands; University of California, Berkeley, United States; Dipartimento di Fisica, Università di Genova, INFN, Genova, Italy; Dipartimento di Fisica e Maternatica, Università dell\’Insubria, INFN, Como, Italy; Lawrence Livermore National Laboratory, Livermore, United States; Laboratori Nazionali di Legnaro, Padova, Italy

Abstract: CUORICINO is an array of 62 TeO2 bolometers with a total mass of 40.7 kg (11.2 kg of 130Te), operated at about 10 mK to search for ßß(0?) of 130Te. The detectors are organized as a 14-story tower and intended as a slightly modified version of one of the 19 towers of the CUORE project, a proposed tightly packed array of 988 TeO 2 bolometers (741 kg of total mass of TeO2) for ultralow-background searches on neutrinoless double-beta decay, cold dark matter, solar axions, and rare nuclear decays. Started in April 2003 at the Laboratori Nazionali del Gran Sasso (LNGS), CUORICINO data taking was stopped in November 2003 to repair the readout wiring system of the 62 bolometers. Restarted in spring 2004, CUORICINO is presently the most sensitive running experiment on neutrinoless double-beta decay. No evidence for ßß(0?) decay has been found so far and a new lower limit, T 1 2/0? = 1.8 × 1024 yr (90% C.L.), is set, corresponding to = 0.2-1.1 eV, depending on the theoretical nuclear matrix elements used in the analysis. Detector performance, operational procedures, and background analysis results are reviewed. The expected performance and sensitivity of CUORE is also discussed.


Volume: 69 (12)      Pages from: 2083  to: 2089

More Information: This work has been partially supported by the Commission of European Communities (contract no. HPRN-CT-2002-00322), by the US Department of Energy (contract no. DEAC03-76-SF00098), and by the National Science Foundation (grant no. PHY-0139294).
DOI: 10.1134/S1063778806120118

Citations: 2
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