Natural $Z^{\prime }$ model with an inverse seesaw and leptonic dark matter

Abstract

We consider a model for a Z'-boson coupled only to baryon minus lepton number and hypercharge. Besides the usual right-handed neutrinos, we add a pair of fermions with a fractional lepton charge, which we therefore call leptinos. One of the leptinos is taken to be odd under an additional Z_2 charge, the other even. This allows for a natural (inverse) seesaw mechanism for neutrino masses. The odd leptino is a candidate for dark matter, but has to be resonantly annihilated by the Z'-boson or the Higgs-boson responsible for giving mass to the former. Considering collider and cosmological bounds on the model, we find that the Z'-boson and/or the extra Higgs-boson can be seen at the LHC. With more pairs of leptinos leptogenesis is possible.

29 pages, 9 figures. RGE section moved to appendix and other minor corrections applied to matched published version

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Cited by in corpus (13)

• Direct Bounds on Electroweak Scale Pseudo-Dirac Neutrinos from $\sqrt{s}=8$ TeV LHC Data
• $Z^{\prime }$-portal right-handed neutrino dark matter in the minimal U(1)${}_X$ extended Standard Model
• Neutrino Mass and Dark Matter from Gauged $U(1{)}_{B-L}$ Breaking
• Lepton-Flavored Dark Matter
• Connecting neutrino physics with dark matter
• A new B-L model without right-handed neutrinos
• Search for a New B-L Z' Gauge Boson with the NA64 Experiment at CERN
• Confronting the Galactic Center Gamma Ray Excess With a Light Scalar Dark Matter
• Gauged Inverse Seesaw from Dark Matter
• Scalar Dark Matter with Type II Seesaw
• Neutrinos with a linear seesaw mechanism in a scenario of gauged B-L symmetry
• Higgs vacuum stability and inflationary dynamics after BICEP2 and PLANCK dust polarisation data
• Heavy neutrinos and neutral gauge boson Z' at the LHC