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Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
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Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
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The quadratic divergences of the Higgs mass may be cancelled either accidentally or by the exchange of some new particles. Alternatively its impact on naturalness may be weakened by raising the Higgs mass, which requires changing the Standard Model below its natural cut-off. We show in detail how this can be achieved, while preserving perturbativity and consistency with the electroweak precision tests, by extending the Standard Model to include a second Higgs doublet that has neither a vev nor couplings to quarks and leptons. This Inert Doublet Model yields a perturbative and completely natural description of electroweak physics at all energies up to 1.5 TeV. The discrete symmetry that yields the Inert Doublet is unbroken, so that Dark Matter may be composed of neutral inert Higgs bosons, which may have escaped detection at LEP2. Predictions are given for multilepton events with missing transverse energy at the Large Hadron Collider, and for the direct detection of dark matter.
Forward citations
Cited by 10 Pith papers
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An explicit model is built where Dirac fermion dark matter semi-annihilates to boosted dark matter plus neutrinos, with two-loop radiative neutrino masses, requiring a mediator mass of O(1) MeV to reach O(10^{-36}) cm...
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Search for pair production of additional neutral scalars within the Inert Doublet Model in a final state with two electrons or two muons in proton-proton collisions at $\sqrt{s}$ = 13 TeV and 13.6 TeV
No significant excess found; new exclusion limits reach m_H = 108 GeV for m_H - m_A = 78 GeV in the Inert Doublet Model.
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Fermi LAT data on mini-spikes around stellar-mass black holes rules out substantial regions of Inert Doublet Model dark matter parameter space, especially at multi-TeV masses.
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LHC Mono-$W/Z$ Signatures as a Probe for Dark Matter Explanations of Astrophysical Excesses
LHC mono-W/Z searches with a new channel-separation method can exclude large ranges of neutral and charged mass splittings in the 70-75 GeV IDM dark matter scenario that fits astrophysical excesses.
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Radiative neutrino mass generation and dark matter through vectorlike leptons
A three-loop radiative neutrino mass model with vectorlike leptons and scalar dark matter that fits oscillation data, dark matter constraints, and lepton flavor violation bounds while predicting testable signals.
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Singlet-doublet dark matter induced radiative neutrino mass and TeV scale leptogenesis
Singlet-doublet dark matter induces radiative neutrino masses at one loop while enabling TeV-scale leptogenesis in both Majorana and Dirac realizations.
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