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Dark Matter and Neutrino Masses from Global U(1)B-L Symmetry Breaking

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30768

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

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30996

Schmidt,  Daniel
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31026

Schwetz,  Thomas
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

Externe Ressourcen
Volltexte (frei zugänglich)

1105.4626
(Preprint), 11KB

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Zitation

Lindner, M., Schmidt, D., & Schwetz, T. (2011). Dark Matter and Neutrino Masses from Global U(1)B-L Symmetry Breaking. Physics Letters B, 705(4), 324-330.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-3CA8-D
Zusammenfassung
We present a scenario where neutrino masses and Dark Matter are related due to a global $U(1)_{B-L}$ symmetry. Specifically we consider neutrino mass generation via the Zee--Babu two-loop mechanism, augmented by a scalar singlet whose VEV breaks the global $U(1)_{B-L}$ symmetry. In order to obtain a Dark Matter candidate we introduce two Standard Model singlet fermions. They form a Dirac particle and are stable because of a remnant $Z_2$ symmetry. Hence, in this model the stability of Dark Matter follows from the global $U(1)_{B-L}$ symmetry. We discuss the Dark Matter phenomenology of the model, and compare it to similar models based on gauged $U(1)_{B-L}$. We argue that in contrast to the gauged versions, the model based on the global symmetry does not suffer from severe constraints from $Z'$ searches.