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Minimal but non-minimal inflation and electroweak symmetry breaking · Around

2016

Minimal but non-minimal inflation and electroweak symmetry breaking

Marzola, Luca, Racioppi, Antonio

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We consider the most minimal scale invariant extension of the standard model that allows for successful radiative electroweak symmetry breaking and inflation.

The framework involves an extra scalar singlet, that plays the r\^ole of the inflaton, and is compatibile with current experimental bounds owing to the non-minimal coupling of the latter to gravity.
This inflationary scenario predicts a very low tensor-to-scalar ratio $r \approx 10^{-3}$, typical of Higgs-inflation models, but in contrast yields a scalar spectral index $n_s \simeq 0.97$ which departs from the Starobinsky limit.
We briefly discuss the collider phenomenology of the framework.

Built on

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A. D. Linde, A New Inflationary Universe Scenario: A Possible Solution of the Horizon, Flatness, Homogeneity, Isotropy and Primordial Monopole Problems , Phys.Lett. B108
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F. L. Bezrukov and M. Shaposhnikov, The Standard Model Higgs boson as the inflaton , Phys. Lett. B659
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Similar

M. Kadastik, K. Kannike, A. Racioppi and M. Raidal, Implications of the 125 GeV Higgs boson for scalar dark matter and for the CMSSM phenomenology , JHEP 05
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2012
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D. Buttazzo, G. Degrassi, P. P. Giardino, G. F. Giudice, F. Sala, A. Salvio et al., Investigating the near-criticality of the Higgs boson , JHEP 12
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2013
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M. Heikinheimo, A. Racioppi, M. Raidal, C. Spethmann and K. Tuominen, Physical Naturalness and Dynamical Breaking of Classical Scale Invariance , Mod. Phys. Lett. A29
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2014
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E. Gabrielli, M. Heikinheimo, K. Kannike, A. Racioppi, M. Raidal and C. Spethmann, Towards Completing the Standard Model: Vacuum Stability, EWSB and Dark Matter , Phys.Rev. D89
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2014
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Then

K. Kannike, G. Hütsi, L. Pizza, A. Racioppi, M. Raidal, A. Salvio et al., Dynamically Induced Planck Scale and Inflation , JHEP 05
Original
2015
Later among the works it cites.
K. Allison, C. T. Hill and G. G. Ross, An ultra-weak sector, the strong CP problem and the pseudo-Goldstone dilaton , Nucl. Phys. B891
Original
2015
Later among the works it cites.
K. Cheung, P. Ko, J. S. Lee and P.-Y. Tseng, Bounds on Higgs-Portal models from the LHC Higgs data , JHEP 10
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2015
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ATLAS, CMS
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2015
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J. B. Munoz and M. Kamionkowski, Equation-of-State Parameter for Reheating , Phys. Rev. D91
Original

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