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T: Fachverband Teilchenphysik

T 41: Neutrinophysik (Theorie)

T 41.4: Vortrag

Montag, 24. März 2014, 17:30–17:45, P108

Dark matter and U(1)' symmetry for the right-handed neutrinos — •Manfred Lindner, Daniel Schmidt, and Atsushi Watanabe — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117, Heidelberg, Germany

We consider a U(1)' gauge symmetry acting on three generations of right-handed neutrinos. The U(1)' symmetry is broken at the TeV scale and its remnant discrete symmetry makes one of the right-handed neutrinos stable. As a natural consequence of the anomaly cancellation, the neutrino mass matrix consists of a combination of Type I (TeV scale) seesaw and radiative correction. The stable right-handed neutrino communicates with the Standard Model via s-channel exchange of the Higgs field and the U(1)' gauge boson, so that the observed relic density for dark matter is obtained in a wide range of the parameter space. The experimental signatures in collider and other experiments are briefly discussed.