Constraining Extended Scalar Sectors at the LHC and beyond

Abstract

We give a brief overview of beyond the Standard Model (BSM) theories with an extended scalar sector and their phenomenological status in the light of recent experimental results. We discuss the relevant theoretical and experimental constraints, and show their impact on the allowed parameter space of two specific models: the real scalar singlet extension of the Standard Model (SM) and the Inert Doublet Model. We emphasize the importance of the LHC measurements, both the direct searches for additional scalar bosons, as well as the precise measurements of properties of the Higgs boson of mass 125 GeV. We show the complementarity of these measurements to electroweak and dark matter observables.

18 pages, 8 figures; prepared for submission to MPLA (invited review) v2: several references and small text modification added to align with journal version. 2 small errors in plots corrected

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• Dark sector searches with the CMS experiment
• Direct and indirect probes of Goldstone dark matter
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• Primordial Black Holes from Conformal Higgs
• Uncovering the High Scale Higgs Singlet Model
• Exotic Gravitational Wave Signatures from Simultaneous Phase Transitions
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• Baryonic Higgs and Dark Matter
• Almost Inert Higgs Bosons at the LHC
• Loop induced singlet scalar production through the vector like top quark at future lepton colliders
• Full one-loop radiative corrections to $e^{+}{e}^{-}\to H^{+}{H}^{-}$ in the inert doublet model
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