WIMP Dark Matter and Unitarity-Conserving Inflation via a Gauge Singlet Scalar

Abstract

A gauge singlet scalar with non-minimal coupling to gravity can drive inflation and later freeze out to become cold dark matter. We explore this idea by revisiting inflation in the singlet direction (S-inflation) and Higgs Portal Dark Matter in light of the Higgs discovery, limits from LUX and observations by Planck. We show that large regions of parameter space remain viable, so that successful inflation is possible and the dark matter relic abundance can be reproduced. Moreover, the scalar singlet can stabilise the electroweak vacuum and at the same time overcome the problem of unitarity-violation during inflation encountered by Higgs Inflation, provided the singlet is a real scalar. The 2-$\sigma$ Planck upper bound on $n_s$ imposes that the singlet mass is below 2 TeV, so that almost the entire allowed parameter range can be probed by XENON1T.

22 pages, 7 figures; v2: minor changes, references added, matches published version

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Cited by in corpus (46)

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• A unified explanation for dark matter and electroweak baryogenesis with direct detection and gravitational wave signatures
• Global analyses of Higgs portal singlet dark matter models using GAMBIT
• TeV scale leptogenesis, inflaton dark matter and neutrino mass in a scotogenic model
• Combined analysis of effective Higgs portal dark matter models
• Impact of vacuum stability, perturbativity and XENON1T on global fits of ${\mathbb{Z}}_2$ and ${\mathbb{Z}}_3$ scalar singlet dark matter
• Hidden Inflaton Dark Matter
• Tracing the high energy theory of gravity: an introduction to Palatini inflation
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• New Constraints on Higgs-portal Scalar Dark Matter
• Feebly Interacting Dark Matter Particle as the Inflaton
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• A global fit of the $\gamma$-ray galactic center excess within the scalar singlet Higgs portal model
• From inflation to cosmological electroweak phase transition with a complex scalar singlet
• Scalar Dark Matter: Direct vs. Indirect Detection
• A Strong Electroweak Phase Transition from the Inflaton Field
• Scalar Singlet Dark Matter and Gamma Lines
• Post-Newtonian parameter $\gamma$ for multiscalar-tensor gravity with a general potential
• Low-scale leptogenesis assisted by a real scalar singlet
• Signatures of Non-thermal Dark Matter with Kination and Early Matter Domination: Gravitational Waves versus Laboratory Searches
• WIMPflation
• Does Palatini Higgs Inflation Conserve Unitarity?
• Polynomial Inflation and Dark Matter
• Non-thermal production of Dark Matter after Inflation
• Protecting the Stability of the EW Vacuum from Planck-Scale Gravitational Effects
• Ultraviolet behaviour of Higgs inflation models
• Impact of New Physics on the EW vacuum stability in a curved spacetime background
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• Common origin of modified chaotic inflation, non thermal dark matter and Dirac neutrino mass
• The Inflaton Portal to Dark Matter
• Inflection-point Inflation and Dark Matter Redux
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• Self-Interacting Dark Matter with Naturally Light Mediator
• Inflation and Dark Matter in the $Z_5$ Model
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• Chaotic initial conditions for nonminimally coupled inflation via a conformal factor with a zero
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• Supersymmetric $\nu$-Inflaton Dark Matter
• Post-inflationary production of particle Dark Matter: Hilltop and Coleman-Weinberg inflation
• Origin of neutrino masses, dark matter, leptogenesis, and inflation in a seesaw model with triplets