Probing leptophilic dark sectors with hadronic processes

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.
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Physics Letters B, Elsevier, 2017, 771, pp.339-348. <10.1016/j.physletb.2017.05.063>
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Dernière modification le : dimanche 11 juin 2017 - 01:08:22

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Francesco D'Eramo, Bradley J. Kavanagh, Paolo Panci. Probing leptophilic dark sectors with hadronic processes. Physics Letters B, Elsevier, 2017, 771, pp.339-348. <10.1016/j.physletb.2017.05.063>. <hal-01535668>

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