Towards Completing the Standard Model: Vacuum Stability, EWSB and Dark Matter
By Emidio Gabrielli, M. Heikinheimo, K. Kannike, A. Racioppi, M. Raidal, C. Spethmann. 2013
181 citations recorded by the source corpus.
We study the standard model (SM) in its full perturbative validity range between $\Lambda_QCD$ and the $U(1)_Y$ Landau pole, assuming that a yet unknown gravitational theory in the UV does not introduce additional particle thresholds, as suggested by the tiny cosmological constant and the absence of new stabilising physics at the EW scale. We find that, due to dimensional transmutation, the SM Higgs potential has a global minimum at 10^26 GeV, invalidating the SM as a phenomenologically acceptable model in this energy range. We show that extending the classically scale invariant SM with one complex singlet scalar S allows us to: (i) stabilise the SM Higgs potential; (ii) induce a scale in the singlet sector via dimensional transmutation that generates the negative SM Higgs mass term via the Higgs portal; (iii) provide a stable CP-odd singlet as the thermal relic dark matter due to CP-conservation of the scalar potential; (iv) provide a degree of freedom that can act as an inflaton in the form of the CP-even singlet. The logarithmic behaviour of dimensional transmutation allows one to accommodate the large hierarchy between the electroweak scale and the Landau pole, while understanding the latter requires a new non-perturbative view on the SM.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/155565a6eea37e083412f47a97e2ace5a7ca59dc
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Citations in the corpus
- Dynamically induced Planck scale and inflation (2015, background): “J H E P 0 5 ( 2 0 1 5 ) 0 6 5 classical scale invariance and dynamical generation of mass scales [8–39].”
- Dark matter and neutrino masses from a scale-invariant multi-Higgs portal (2015, background): “the classically scale invariant version of the Standard Model [32–38].”