Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-11-29
Physics
High Energy Physics
High Energy Physics - Phenomenology
Some typos corrected and references added
Scientific paper
The minimal Standard Model extension with the Weinberg operator does accommodate the observed neutrino masses and mixing, but predicts a neutrinoless double beta ($0\nu\beta\beta$) decay rate proportional to the effective electron neutrino mass, which can be then arbitrarily small within present experimental limits. However, in general $0\nu\beta\beta$ decay can have an independent origin and be near its present experimental bound; whereas neutrino masses are generated radiatively, contributing negligibly to $0\nu\beta\beta$ decay. We study in detail a simple, well-defined and testable model of such a scenario, with possible traces at LHC. In this type of models lepton flavor violating rates are also preferred to be relatively large, at the reach of foreseen experiments. Interestingly enough, in our model this stands for a large third mixing angle, $\sin^2\theta_{13} \gtrsim 0.008$, when $\mu \rightarrow eee$ is required to lie below its present experimental limit.
Aguila Francisco del
Aparici Alberto
Bhattacharya Subhaditya
Santamaria Arcadi
Wudka Jose
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