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- W43072469 abstract "The HEIDELBERG-MOSCOW experiment, which is the most sensitive double beta decay experiment since ten years has been regularly continued until end of November 2003. An analysis of the data has been performed already until May 20, 2003. The experiment yields now, on a 4σ level, evidence for lepton number violation and proves that the neutrino is a Majorana particle. It further shows that neutrino masses are degenerate. In addition it puts several stringent constraints on other physics beyond the Standard Model. Among others it opens the door to test various supersymmetric theory scenarios, for example it gives the sharpest limit on the parameter λ′111 in the R-parity violating part of the superpotential, and gives information on the splitting of the sneutrino-antisneutrino system. The result from the HEIDELBERG-MOSCOW experiment is consistent with recent results from CMB investigations, with high energy cosmic rays, with the result from the g-2 experiment and with recent theoretical work. It is indirectly supported by the analysis of other Ge double beta experiments. Recent criticism of various kind has been shown to be wrong, among others by measurements performed in 2003 with a 214Bi source (226Ra), by simulation of the background in the range of Qββ by GEANT4, and by deeper investigation of statistical features such as sensitivity of peak search, and relevance of width of window of analysis." @default.
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- W43072469 date "2004-01-01" @default.
- W43072469 modified "2023-09-27" @default.
- W43072469 title "Heidelberg - Moscow Experiment on Neutrinoless Double Beta Decay" @default.
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