First results of the CUORICINO experiment

Year: 2005

Authors: Pirro S., Arnaboldi C., Artusa D.R., Avignone III F.T., Balata M., Bandac I., Barucci M., Beeman J., Brofferio C., Bucci C., Capelli S., Capozzi F., Carbone L., Cebrian S., Cremonesi O., Creswick R.J., de Waard A., Farach H.A., Fascilla A., Fiorini E., Frossati G., Giuliani A., Gorla P., Haller E.E., Irastorza I.G., McDonald R.J., Morales A., Norman E.B., Nucciotti A., Olivieri E., Palmieri V., Pasca E., Pavan M., Pedretti M., Pessina G., Previtali E., Pobes C., Pyle M., Risegari L., Rosenfeld C., Sisti M., Smith A.R., Torres L., Ventura G.

Autors Affiliation: Dipartimento di Fisica, Università di Milano-Bicocca, Sezione di Milano dell\’INFN, Milano I-20126, Italy; Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208, United States; Laboratori Nazionali del Gran Sasso, Assergi, L\’Aquila I-67010, Italy; Dipartimento di Fisica, Università di Firenze, Sezione di Firenze dell\’INFN, Firenze I-50125, Italy; Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Laboratorio de Fisica Nuclear y Altas Energias, Universidàd de Zaragoza, 50009 Zaragoza, Spain; Kamerling Onnes Laboratory, Leiden University, 2300 RAQ Leiden, Netherlands; Dipartimento di Scienze Chimiche, Fisiche e Matematiche, Università dell\’Insubria, Sezione di Milano dell\’INFN, Como I-22100, Italy; Department of Materials Science and Mineral Engineering, University of California, Berkeley, CA 94720, United States; Laboratori Nazionali di Legnaro, Via Romea 4, I-35020 Legnaro, Padova, Italy

Abstract: Preliminary results on double beta decay (DBD) of 130Te, obtained in the first run of the CUORICINO experiment are presented. The set-up consists of an array of 62 crystals of TeO2 operating as bolometers in a deep underground dilution unit at a temperature of about 10 mK. Due to a total mass of about 41 kg, CUORICINO represents by far the most massive running cryogenic mass to search for rare events. The achieved lower limit on the neutrinoless DBD is 5.5·1023 years, that corresponds to a limit on the Majorana effective mass between 0.37 and 1.9 eV. Performances of the detectors together with the sensitivity estimation are discussed.

Journal/Review: NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS

Volume: 138 (1-3)      Pages from: 210  to: 213

More Information: Thanks are due to the Laboratori Nazionali del Gran Sasso for generous hospitality and to M. Perego, G.Galotta, S. Parmeggiano, R. Gaigher, A. Rotilio, B. Romualdi, and especially to P. Nuvolone and S. Nisi for continuous and constructive help in various stages of this experiment. We also gratefully acknowledge Dr. Angelo Alessandrello for his generous and fundamental help in the first 15 years of the bolometric adventure. This experiment has been partially supported by the Commission of European Communities under contract FMRX–CT98–0167. †Correspond to Stefano.Pirro@mib.infn.it
KeyWords: Decay; Neutrinos; Double β
DOI: 10.1016/j.nuclphysbps.2004.11.050

Citations: 1
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