Consequences of a Pati-Salam unification of the electroweak-scale active ${\nu }_R$ model

Abstract

If right-handed neutrinos are {\em not} singlets under the electroweak gauge group as it was proposed in a recent model, they can acquire electroweak scale masses and are thus accessible experimentally in the near future. When this idea is combined with quark-lepton unification à la Pati-Salam, one is forced to introduce new neutral particles which are singlets under the Standard Model (SM). These "sterile neutrinos" which exist in both helicities and which are different in nature from the popular particles with the same name can have their own seesaw with masses in the keV range for the lighter of the two eigenstates. The keV sterile neutrinos have been discussed in the literature as warm dark matter candidates with wide ranging astrophysical consequences such as structure formation, supernova asymetries, pulsar kicks, etc..In addition, the model contains W-like and Z-like heavy gauge bosons which might be accessible at the LHC or the ILC. An argument is presented on why, in this model, it is natural to have four families which can obey existing constraints.

19 double-column pages, RevTex. Streamlined version to appear in Nucl. Phys. B

References in corpus (18)

• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• How to find neutral leptons of the nuMSM?
• A possible symmetry of the $\nu$MSM
• Signatures for Majorana neutrinos at hadron colliders
• Relic keV sterile neutrinos and reionization
• The discovery of the fourth family at the LHC: what if?
• A model of electroweak-scale right-handed neutrino mass
• Sterile neutrinos as subdominant warm dark matter
• Experimental constraints on fourth generation quark masses
• Gauge Trimming of Neutrino Masses
• Fourth Generation CP Violation Effect on B -> K pi, phi K and rho K in NLO PQCD
• Sterile neutrinos: direct mixing effects versus induced mass matrix of active neutrinos
• The heavy quark search at the LHC
• Sterile neutrinos
• Electroweak-scale mirror fermions, $\mu \to e\gamma$ and $\tau \to \mu \gamma$
• Four Generation CP Violation in B -> phi K^0, pi^0 K^0, eta' K^0 and Hadronic Uncertainties
• Connecting Dark Energy to Neutrinos with an Observable Higgs Triplet
• Quark-lepton mass unification at TeV scales

Cited by in corpus (2)

• An MSSM Extension with a Mirror Fourth Generation, Neutrino Magnetic Moments and LHC Signatures
• Theoretical Overview of Neutrino Properties