Search for neutrinoless double beta decay with enriched 76Ge in Gran Sasso 1990–2003

2004/03/14 by H. V. Klapdor‐Kleingrothaus, H. V. Klapdor-Kleingrothaus, I. V. Krivosheina +3 · 22 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Double beta decay #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics theoretical and experimental studies #Physics #hep-ph

paper · pdf · doi:10.1016/j.physletb.2004.02.025

published as Phys.Lett.B586:198-212,2004 · 19 pages, latex, 9 figures, 2 tables

openalex publication_date 2004/03/14 · arxiv created 2004/04/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The results of the HEIDELBERG-MOSCOW experiment which searches with 11 kg of enriched 76Ge for double beta decay in the GRAN Sasso underground laboratory are presented for the full running period August 1990 - May 2003. The duty cycle of the experiment was ~80%, the collected statistics is 71.7 kg y. The background achieved in the energy region of the Q value for double beta decay is 0.11 events/ kg y keV. The two-neutrino accompanied half-life is determined on the basis of more than 100 000 events. The confidence level for the neutrinoless signal has been improved to 4.2 sigma.

Citations

• Determination of Absolute Neutrino Masses from Bursts ofZBosons in Cosmic Rays
• EVIDENCE FOR NEUTRINOLESS DOUBLE BETA DECAY
• Spacetime structure of massive gravitino
• IMPLICATIONS OF OBSERVED NEUTRINOLESS DOUBLE BETA DECAY
• Review of Particle Physics

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