Bounds on the Fermion-Bulk Masses in Models with Universal Extra Dimensions

Abstract

In models with extra dimensions, vectorlike Dirac masses for fermion fields are generically allowed. These masses are independent of electroweak symmetry breaking and do not contribute to the known masses for the quarks and leptons. They control the profile of the bulk wave functions, the mass spectra of Kaluza-Klein modes, and interactions that could be tested in experiments. In this article, we study the effects of bulk masses in electroweak precision measurements and in dark matter and collider searches, to set bounds on the bulk mass parameters in models with a flat universal extra dimension, namely, Split-UED. We find the current bound on the universal bulk-mass to be smaller than (0.2-0.3)/R, where R is the radius of the extra dimension. Similar but slightly relaxed bounds are obtained in the non-universal bulk mass case. The LHC is expected to play an important role in constraining the remaining parameter space.

25 pages, 16 figures

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Cited by in corpus (22)

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• Inclusive nonresonant multilepton probes of new phenomena at $\sqrt{s}=$ 13 TeV
• Non-minimal Universal Extra Dimensions: The strongly interacting sector at the Large Hadron Collider
• 126 GeV Higgs in Next-to-Minimal Universal Extra Dimensions
• Electroweak Kaluza-Klein Dark Matter
• Vector Leptons in the Higgs Triplet Model
• Leptophilic Dark Matter and AMS-02 Cosmic-ray Positron Flux
• Constraints on UED from W' searches
• A Review on Non-Minimal Universal Extra Dimensions
• AMS-02 and Next-to-Minimal Universal Extra Dimensions
• Minimal and non-minimal Universal Extra Dimension models in the light of LHC data at 13 TeV
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• Search for vector-like leptons coupling to first- and second-generation Standard Model leptons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Possible Suppression of Resonant Signals for Split-UED by Mixing at the LHC?
• Dark Matter and Collider Searches in $S_3$-Symmetric 2HDM with Vector Like Leptons
• Constraining Bosonic Supersymmetry from Higgs results and 8 TeV ATLAS multi-jets plus missing energy data
• Mono-top Signature from Fermionic Top-partner
• Belle II Constraints on the Non-Minimal Universal Extra Dimensional Model
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