Lepton Number and Lepton Flavor Violation through Color Octet States

Details Lepton Number and Lepton Flavor Violation through Color Octet States Lepton Number and Lepton Flavor Violation through Color Octet States

2012-01-14

arxiv.org/abs/1201.3031v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 16 figures

Scientific paper

We discuss neutrinoless double beta decay and lepton flavor violating decays such as $\mu->e\gamma$ in the colored seesaw scenario. In this mechanism, neutrino masses are generated at one-loop via the exchange of TeV-scale fermionic and scalar color octets. The same particles mediate lepton number and flavor violating processes. We show that within this framework a dominant color octet contribution to neutrinoless double beta decay is possible without being in conflict with constraints from lepton flavor violating processes. We furthermore compare the "direct" color octet contribution to neutrinoless double beta decay with its "indirect" contribution, namely the usual standard light Majorana neutrino exchange. For degenerate color octet fermionic states both contributions are proportional to the usual effective mass, while for non-degenerate octet fermions this feature is not present. Depending on the model parameters, either of the contributions can be dominant.

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