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Journal Article

Lepton Number and Lepton Flavor Violation through Color Octet States

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons37609

Duerr,  Michael
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30951

Rodejohann,  Werner
Werner Rodejohann - ERC Starting Grant, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

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Fulltext (public)

1201.3031
(Preprint), 2MB

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Citation

Choubey, S., Duerr, M., Mitra, M., & Rodejohann, W. (2012). Lepton Number and Lepton Flavor Violation through Color Octet States. Journal of high energy physics: JHEP, 2012(05): 017, pp. 1-21. doi:10.1007/JHEP05(2012)017.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-2089-6
Abstract
We discuss neutrinoless double beta decay and lepton flavor violating decays such as μ → eγ 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 the “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.