Phenomenological aspects of light and heavy Majorana neutrinos
Abstract:Using data from oscillation analyses, the ranges of the neutrino mixing matrix and the Majorana mass matrix are calculated. It is investigated whether observable effects apart from neutrinoless double beta decay can be expected. Branching ratios and cross sections for a variety of high and low energy lepton number violating processes are estimated. Direct and indirect limits on all entries of the Majorana mass matrix are defined and compared. Only neutrinoless double beta decay, depending on the ee element of the mass matrix, provides a realistic chance for observation. The consequences of this fact for determination of the complete mass matrix are discussed. A similar analysis is performed for effects of heavy Majorana neutrinos, where a different matrix is used and unitarity allows us to set lower limits on the respective processes.
Document Type: Miscellaneous
Publication date: June 1, 2002