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

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arxiv 1011.4811 v2 pith:UGJRZNHH submitted 2010-11-22 nucl-ex hep-ex

E. Andreotti , C. Arnaboldi , F. T. Avignone III , M. Balata , I. Bandac , M. Barucci , J. W. Beeman , F. Bellini
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C. Brofferio A. Bryant C. Bucci L. Canonica S. Capelli L. Carbone M. Carrettoni M. Clemenza O. Cremonesi R. J. Creswick S. Di Domizio M. J. Dolinski L. Ejzak R. Faccini H. A. Farach E. Ferri E. Fiorini L. Foggetta A. Giachero L. Gironi A. Giuliani P. Gorla E. Guardincerri T. D. Gutierrez. E. E. Haller K. Kazkaz S. Kraft L. Kogler C. Maiano R. H. Maruyama C. Martinez M. Martinez L. Mizouni S. Newman S. Nisi C. Nones E. B. Norman A. Nucciotti F. Orio M. Pallavicini V. Palmieri L. Pattavina M. Pavan M. Pedretti G. Pessina S. Pirro E. Previtali L. Risegari C. Rosenfeld C. Rusconi C. Salvioni S. Sangiorgio D. Schaeffer N. D. Scielzo M. Sisti A. R. Smith C. Tomei G. Ventura M. Vignati
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classification nucl-exhep-ex
keywords betamodeneutrinodecaydoublelimitsplussearch
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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).

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