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Exotic Charges, Multicomponent Dark Matter and Light Sterile Neutrinos

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons37613

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

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31207

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

Volltexte (frei zugänglich)

1211.0538
(Preprint), 414KB

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Zitation

Heeck, J., & Zhang, H. (2013). Exotic Charges, Multicomponent Dark Matter and Light Sterile Neutrinos. Journal of high energy physics: JHEP, 2013(05): 164, pp. 1-21. doi:10.1007/JHEP05(2013)164.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-F764-A
Zusammenfassung
Generating small sterile neutrino masses via the same seesaw mechanism that suppresses active neutrino masses requires a specific structure in the neutral fermion mass matrix. We present a model where this structure is enforced by a new U(1)' gauge symmetry, spontaneously broken at the TeV scale. In order not to spoil the neutrino structure, the additional fermions necessary for anomaly cancellations need to carry exotic charges, and turn out to form multicomponent cold dark matter. The active-sterile mixing then connects the new particles and the Standard Model---opening a new portal in addition to the usual Higgs- and kinetic-mixing portals---which leads to dark matter annihilation almost exclusively into neutrinos.