D. Schaeffer

Search for double-β decay of 130Te to the first 0+ excited state of 130Xe with the CUORICINO experiment bolometer array

E. Andreotti, 2, a C. Arnaboldi, F. T. Avignone III, M. Balata, I. Bandac, M. Barucci, 7 J. W. Beeman, F. Bellini, 10 C. Brofferio, 3 A. Bryant, 12 C. Bucci, L. Canonica, 14 S. Capelli, 3 L. Carbone, M. Carrettoni, 3 M. Clemenza, 3 O. Cremonesi, R. J. Creswick, S. Di Domizio, 14 M. J. Dolinski, 15 L. Ejzak, R. Faccini, 10 H. A. Farach, E. Ferri, 3 E. Fiorini, 3, b L. Foggetta, 2, c A. Giachero, L. Gironi, 3 A. Giuliani, 2, d P. Gorla, e E. Guardincerri, 11, 14 T. D. Gutierrez, E. E. Haller, 18 K. Kazkaz, L. Kogler, 12 S. Kraft, 3 C. Maiano, 3 C. Martinez, f M. Martinez, 19, g R. H. Maruyama, S. Newman, 5 S. Nisi, C. Nones, 2, h E. B. Norman, 20 A. Nucciotti, 3 F. Orio, 10 M. Pallavicini, 14 V. Palmieri, L. Pattavina, 3 M. Pavan, 3 M. Pedretti, G. Pessina, S. Pirro, E. Previtali, L. Risegari, 7 C. Rosenfeld, C. Rusconi, 2 C. Salvioni, 2 S. Sangiorgio, i D. Schaeffer, 3 N. D. Scielzo, M. Sisti, 3 A. R. Smith, C. Tomei, G. Ventura, 7 and M. Vignati 10 Dipartimento di Fisica e Matematica, Università dell’Insubria, Como I-22100 Italy INFN Sezione di Milano Bicocca, Milano I-20126 Italy Dipartimento di Fisica, Università di Milano-Bicocca, Milano I-20126 Italy Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208 USA INFN Laboratori Nazionali del Gran Sasso, Assergi (L’Aquila) I-67010 Italy Dipartimento di Fisica, Università di Firenze, Firenze I-50125 Italy INFN Sezione di Firenze, Firenze I-50125 Italy Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA Dipartimento di Fisica, Sapienza Università di Roma, Roma I-00185 Italy INFN Sezione di Roma, Roma I-00185 Italy Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA Department of Physics, University of California, Berkeley, CA 94720 USA Dipartimento di Fisica, Università di Genova, Genova I-16146 Italy INFN Sezione di Genova, Genova I-16146 Italy Lawrence Livermore National Laboratory, Livermore, CA 94550 USA Department of Physics, University of Wisconsin, Madison, WI 53706 USA Physics Department, California Polytechnic State University, San Luis Obispo, CA 93407 USA Department of Materials Science and Engineering, University of California, Berkeley, CA 94720 USA Laboratorio de Fisica Nuclear y Astroparticulas, Universidad de Zaragoza, Zaragoza 50009 Spain Department of Nuclear Engineering, University of California, Berkeley, CA 94720 USA INFN Laboratori Nazionali di Legnaro, Legnaro (Padova) I-35020 Italy EH&S Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA (Dated: February 1, 2013)

CUORE EXPERIMENT: THE SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY

The main purpose of the Cryogenic Underground Observatory for Rare Events (CUORE) experiment is the search for the Neutrinoless Double Beta Decay (0νDBD) of 130Te reaching a sensitivity on Majorana mass better than 50 meV. Cuoricino represents not only the first stage of CUORE, but also the most massive 0νDBD experiment presently running. Present results and future planning of these experiments will be described in the paper.

Search for β+/EC double beta decay of120Te

We present a search for beta plus/EC double beta decay of 120Te performed with the CUORICINO experiment, an array of TeO2 cryogenic bolometers. After collecting 0.0573 kg y of 120Te, we see no evidence of a signal and therefore set the following limits on the half-life: T1/2 (0nu) > 1.9 10^{21} y at 90% C.L. for the 0 neutrino mode and T1/2 (2nu) > 7.6 10^{19} y at 90% C.L. for the two neutrino mode. These results improve the existing limits by almost three orders of magnitude (four in the case of 0 neutrino mode).

Search for β+/EC double beta decay of 120Te

We present a search for beta plus/EC double beta decay of 120Te performed with the CUORICINO experiment, an array of TeO2 cryogenic bolometers. After collecting 0.0573 kg y of 120Te, we see no evidence of a signal and therefore set the following limits on the half-life: T1/2 (0nu) > 1.9 10^{21} y at 90% C.L. for the 0 neutrino mode and T1/2 (2nu) > 7.6 10^{19} y at 90% C.L. for the two neutrino mode. These results improve the existing limits by almost three orders of magnitude (four in the case of 0 neutrino mode).

Search for beta(+)/EC double beta decay of Te-120

We present a search for beta plus/EC double beta decay of 120Te performed with the CUORICINO experiment, an array of TeO2 cryogenic bolometers. After collecting 0.0573 kg y of 120Te, we see no evidence of a signal and therefore set the following limits on the half-life: T1/2 (0nu) > 1.9 10^{21} y at 90% C.L. for the 0 neutrino mode and T1/2 (2nu) > 7.6 10^{19} y at 90% C.L. for the two neutrino mode. These results improve the existing limits by almost three orders of magnitude (four in the case of 0 neutrino mode).

Search for beta plus/EC double beta decay of 120Te

We present a search for beta plus/EC double beta decay of 120Te performed with the CUORICINO experiment, an array of TeO2 cryogenic bolometers. After collecting 0.0573 kg y of 120Te, we see no evidence of a signal and therefore set the following limits on the half-life: T1/2 (0nu) > 1.9 10^{21} y at 90% C.L. for the 0 neutrino mode and T1/2 (2nu) > 7.6 10^{19} y at 90% C.L. for the two neutrino mode. These results improve the existing limits by almost three orders of magnitude (four in the case of 0 neutrino mode).

Status of the MARE experiment in Milan

An international collaboration has grown around the project of Microcalorimeter Arrays for a Rhenium Experiment (MARE) for a direct and calorimetric measurement of the electron antineutrino mass with sub‐electronvolt sensitivity.MARE is divided into two phases. The first phase (MARE‐1) consists of two independent experiments using the presently available detector technology to reach a sensitivity of mv⩽2eV/c2. The goal of the second phase (MARE‐2) is to achieve a sub‐electronvolt sensitivity on the neutrino mass.The Milan MARE‐1 experiment is based on arrays of silicon implanted microcalorimeters, produced by NASA/GSFC, with dielectric silver perrhenate absorbers, AgReO4. We present here the status of MARE‐1 in Milan which is starting data taking with 2 arrays (72 detectors). In this configuration a sensitivity of about 5 eV can be achieved in two years. We describe in details the experimental setup which is designed to host up to 8 arrays (288 detectors). With 8 arrays, two years of measurement would imp...