Latest Results from the Heidelberg-Moscow Double Beta Decay Experiment

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dc.creatorKlapdor-Kleingrothaus, H. V.
dc.creatorDietz, A.
dc.creatorBaudis, L.
dc.creatorHeusser, G.
dc.creatorKrivosheina, I. V.
dc.creatorKolb, S.
dc.creatorMajorovits, B.
dc.creatorPaes, H.
dc.creatorStrecker, H.
dc.creatorAlexeev, V.
dc.creatorBalysh, A.
dc.creatorBakalyarov, A.
dc.creatorBelyaev, S. T.
dc.creatorLebedev, V. I.
dc.creatorZhukov, S.
dc.date2001-03-06
dc.date.accessioned2026-07-07T10:32:49Z
dc.date.available2026-07-07T10:32:49Z
dc.descriptionNew results for the double beta decay of 76Ge are presented. They are extracted from Data obtained with the HEIDELBERG-MOSCOW, which operates five enriched 76Ge detectors in an extreme low-level environment in the GRAN SASSO. The two neutrino accompanied double beta decay is evaluated for the first time for all five detectors with a statistical significance of 47.7 kg y resulting in a half life of (T_(1/2))^(2nu) = [1.55 +- 0.01 (stat) (+0.19) (-0.15) (syst)] x 10^(21) years. The lower limit on the half-life of the 0nu beta-beta decay obtained with pulse shape analysis is (T_(1/2))^(0_nu) > 1.9 x 10^(25) [3.1 x 10^(25)] years with 90% C.L. (68% C.L.) (with 35.5 kg y). This results in an upper limit of the effective Majorana neutrino mass of 0.35 eV (0.27 eV). No evidence for a Majoron emitting decay mode or for the neutrinoless mode is observed.
dc.description14 pages, revtex, 6 figures, Talk was presented at third International Conference ' Dark Matter in Astro and Particle Physics' - DARK2000, to be publ. in Proc. of DARK2000, Springer (2000). Please look into our HEIDELBERG Non-Accelerator Particle Physics group home page: http://www.mpi-hd.mpg.de/non_acc/
dc.identifierhttps://arxiv.org/abs/hep-ph/0103062
dc.identifierhttp://arxiv.org/abs/hep-ph/0103062
dc.identifierEur.Phys.J.A12:147-154,2001
dc.identifierdoi:10.1007/s100500170022
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178890
dc.subjectHigh Energy Physics - Phenomenology
dc.titleLatest Results from the Heidelberg-Moscow Double Beta Decay Experiment
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