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Probing Leptophilic Dark Sectors with Hadronic Processes
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abstract
We study vector portal dark matter models where the mediator couples only to leptons. In spite of the lack of tree-level couplings to colored states, radiative effects generate interactions with quark fields that could give rise to a signal in current and future experiments. We identify such experimental signatures: scattering of nuclei in dark matter direct detection; resonant production of lepton-antilepton pairs at the Large Hadron Collider; and hadronic final states in dark matter indirect searches. Furthermore, radiative effects also generate an irreducible mass mixing between the vector mediator and the $Z$ boson, severely bounded by ElectroWeak Precision Tests. We use current experimental results to put bounds on this class of models, accounting for both radiatively induced and tree-level processes. Remarkably, the former often overwhelm the latter.
Forward citations
Cited by 3 Pith papers
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Constraining the heavy leptophilic neutral gauge bosons through the $Z\to\ell^+\ell^-$, $W^\pm\to\ell^\pm\nu_\ell$, and $h\to\ell^+\ell^-$ decays
One-loop corrections to W/Z/h leptonic widths exclude heavy leptophilic Z' regions (M ≳ O(1) TeV, g' ≳ 0.4) beyond LEP-2 and neutrino-trident limits.
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Searching for a light $Z'$ through Higgs production at the LHC
Existing LHC dilepton and four-lepton searches, reinterpreted for the minimal U(1)_{B-L} model, exclude gauge couplings down to about 5x10^-6 for a 0.25 GeV Z-prime at maximal Higgs mixing.
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Dark matter in the Randall-Sundrum model
A Randall-Sundrum graviton-mediated dark matter model with non-universal couplings can accommodate scalar, vector, fermion, and spin-3/2 dark matter while remaining consistent with relic density, direct detection, ind...
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