A double right-handed U(1) gauge extension generates the Standard Model fermion mass hierarchy at tree and loop levels and stabilizes a viable scalar singlet dark matter particle consistent with relic density and direct detection bounds.
Improved Constraints on Z' Bosons from Electroweak Precision Data
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abstract
We analyze various models with an extra U(1) gauge symmetry in addition to the Standard Model (SM) gauge group at low energies, and impose limits on the mass of the neutral Z' boson, M_Z', predicted in all such models, and on the Z-Z' mixing angle, theta_ZZ'. The precision electroweak data strongly constrain theta_ZZ' to very small values and for most models we find lower limits on M_Z' of order 1 TeV. In one case we obtain a somewhat better fit than in the SM (although this is only marginally statistically significant) and here we find a weak upper limit at the 90% C.L.
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hep-ph 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
In the BLSSM, Z' masses down to 2.24 TeV remain allowed when the boson is fat, leptophobic, or has large branching ratios to model-specific states while respecting LEP/SLC and LHC constraints.
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Physical implications of a double right-handed gauge symmetry
A double right-handed U(1) gauge extension generates the Standard Model fermion mass hierarchy at tree and loop levels and stabilizes a viable scalar singlet dark matter particle consistent with relic density and direct detection bounds.
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The $Z'$-boson of the $B-L$ Supersymmetric Standard Model and its Large Hadron Collider Searches
In the BLSSM, Z' masses down to 2.24 TeV remain allowed when the boson is fat, leptophobic, or has large branching ratios to model-specific states while respecting LEP/SLC and LHC constraints.