Cuoricino results for 2 decay to the first excited state 0 + Sergio Di Domizio for the Cuoricino Collaboration Università and INFN Genova Athens, June.

Cuoricino results for 2nbb decay to the first excited state 0+

Sergio Di Domizio for the Cuoricino Collaboration

Università and INFN Genova

Athens, June 13-19 2010

Cuoricino

• Cuoricino collected data at the Laboratori Nazionali del Gran Sasso between 2003 and 2008

• It is an array of 5x5x5 cm3 TeO2 cryogenic bolometers devoted to the search of 0nbb decay in 130Te

• Cuoricino has a mass of 42 kg (11.8 kg in 130Te)

• The accumulated statistics is 19.8 kg y in ∙ 130Te

• The average energy resolution is 7 keV FWHM at 2.6 MeV

130Te 2nbb decay to the excited state 0+

T1/2 > 1.4 x 1023 y (90% C.L.)

2 de-excitation gs emittedCoincidence based analysis:

strong background reduction

CUORICINO RESULT:

More details in the poster