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  Status of the Zee-Babu model for neutrino mass and possible tests at a like-sign linear collider

Schmidt, D., Schwetz-Mangold, T., & Zhang, H. (2014). Status of the Zee-Babu model for neutrino mass and possible tests at a like-sign linear collider. Nuclear Physics B, 885, 524-541. doi:10.1016/j.nuclphysb.2014.05.024.

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 Urheber:
Schmidt, Daniel1, Autor           
Schwetz-Mangold, Thomas1, Autor           
Zhang, He2, Autor           
Affiliations:
1Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549              
2Werner Rodejohann - ERC Starting Grant, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society, ou_907556              

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Schlagwörter: High Energy Physics - Phenomenology, hep-ph
 Zusammenfassung: We provide an updated scan of the allowed parameter space of the two-loop Zee-Babu model for neutrino mass. Taking into account most recent experimental data on $\mu\to e\gamma$ as well as the mixing angle $\theta_{13}$ we obtain lower bounds on the masses of the singly and doubly charged scalars of between 1 to 2 TeV, with some dependence on perturbativity and fine-tuning requirements. This makes the scalars difficult to observe at LHC with 14 TeV even with optimistic assumptions on the luminosity, and would require a multi-TeV linear collider to see the scalar resonances. We point out, however, that a sub-TeV linear collider in the like-sign mode may be able to observe lepton flavour violating processes such as $e^- e^- \to \mu^- \mu^-$ due to contact interactions induced by the doubly charged scalar with masses up to around 10 TeV. We investigate the possibility to distinguish the Zee-Babu model from the Higgs triplet model using such processes.

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 Datum: 2014-08
 Publikationsstatus: Online veröffentlicht
 Seiten: 12 pages, 7 figures
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Titel: Nuclear Physics B
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Amsterdam : North-Holland
Seiten: - Band / Heft: 885 Artikelnummer: - Start- / Endseite: 524 - 541 Identifikator: ISSN: 0550-3213
CoNE: https://pure.mpg.de/cone/journals/resource/954925564667