Abstract
We re-examine current and future constraints on a heavy dilaton coupled to a simple dark sector consisting of a Majorana fermion or a Stückelberg vector field. We include three different treatments of dilaton-Higgs mixing, paying particular attention to a gauge-invariant formulation of the model. Moreover, we also invite readers to re-examine effective field theories of vector dark matter, which we show are missing important terms. Along with the latest Higgs coupling data, heavy scalar search results, and dark matter density/direct detection constraints, we study the LHC bounds on the model and estimate the prospects of dark matter production at the future HL-LHC and 100 TeV FCC colliders. We additionally compute novel perturbative unitarity constraints involving vector dark matter, dilaton and gluon scattering.
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Fuks, B., Goodsell, M.D., Kang, D.W. et al. Heavy dark matter through the dilaton portal. J. High Energ. Phys. 2020, 44 (2020). https://doi.org/10.1007/JHEP10(2020)044
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DOI: https://doi.org/10.1007/JHEP10(2020)044