English

Results from a search for the $0\nu\beta\beta$-decay of $^{130}Te$

High Energy Physics - Experiment 2008-11-26 v2

Abstract

A detailed description of the CUORICINO 130Te^{130}Te neutrinoless double-beta (\nbb\nbb) decay experiment is given and recent results are reported. CUORICINO is an array of 62 tellurium oxide (TeO2TeO_{2}) bolometers with an active mass of 40.7 kg. It is cooled to 810\sim 8-10 mK by a dilution refrigerator shielded from environmental radioactivity and energetic neutrons. It is running in the Laboratori Nazionali del Gran Sasso (LNGS) in Assergi, Italy. These data represent an exposure of 11.83kg...y11.83\textrm{kg}...\textrm{y} or 91 mole-years of 130Te^{130}Te. No evidence for \nbb\nbb-decay was observed and a limit of T1/20ν(130Te)3.0×1024T^{0\nu}_{1/2}(^{130}Te)\geq3.0\times10^{24} y (90% C.L.) is set. This corresponds to an upper limit on the effective mass, <mν>< m_{\nu}>, between 0.19 and 0.68 eV when analyzed with the many published nuclear structure calculations. In the context of these nuclear models, the values fall within the range corresponding to the claim of evidence of \nbb\nbb-decay by H.V. Klapdor-Kleingrothaus, \textit{et al.} The experiment continues to acquire data.

Keywords

Cite

@article{arxiv.0802.3439,
  title  = {Results from a search for the $0\nu\beta\beta$-decay of $^{130}Te$},
  author = {C. Arnaboldi and D. R. Artusa and F. T. Avignone and M. Balata and I. Bandac and M. Barucci and J. W. Beeman and F. Bellini and C. Brofferio and C. Bucci and S. Capelli and L. Carbone and S. Cebrian and M. Clemenza and O. Cremonesi and R. J. Creswick and A. de Waard and S. Di Domizio and M. J. Dolinski and H. A. Farach and E. Fiorini and G. Frossati and A. Giachero and A. Giuliani and P. Gorla and E. Guardincerri and T. D. Gutierrez and E. E. Haller and R. H. Maruyama and R. J. McDonald and S. Nisi and C. Nones and E. B. Norman and A. Nucciotti and E. Olivieri and M. Pallavicini and E. Palmieri and E. Pasca and M. Pavan and M. Pedretti and G. Pessina and S. Pirro and E. Previtali and L. Risegari and C. Rosenfeld and S. Sangiorgio and M. Sisti and A. R. Smith and L. Torres and G. Ventura and M. Vignati},
  journal= {arXiv preprint arXiv:0802.3439},
  year   = {2008}
}

Comments

30 pages, 7 figures