Abstract
The mechanism behind electroweak symmetry breaking (EWSB) and the nature of dark matter (DM) are currently among the most important issues in high energy physics. Since a natural dark matter candidate is a weakly interacting massive particle or WIMP, with mass around the electroweak scale, it is clearly of interest to investigate the possibility that DM and EWSB are closely related. In the context of a very simple extension of the Standard Model, the inert doublet model, we show that dark matter could play a crucial role in the breaking of the electroweak symmetry. In this model, dark matter is the lightest component of an inert scalar doublet. The coupling of the latter with the Standard Model Higgs doublet breaks the electroweak symmetry at one-loop, à la Coleman–Weinberg. The abundance of dark matter, the breaking of the electroweak symmetry and the constraints from electroweak precision measurements can all be accommodated by imposing (an exact or approximate) custodial symmetry.
Highlights
One of the goals of the Large Hadron Collider is to elucidate the origin of Electroweak Symmetry Breaking (EWSB)
In the framework of the Standard Model (SM), EWSB is expected to be due to the existence of a Brout-Englert-Higgs scalar doublet (Higgs doublet in the sequel) which develops a non-zero vacuum expectation value at tree level
In this article we study a very simple extension of the Standard Model that lies the origin of electroweak symmetry in the existence of a dark matter candidate and its SU(2) partners and their one-loop contribution
Summary
One of the goals of the Large Hadron Collider is to elucidate the origin of Electroweak Symmetry Breaking (EWSB). An attractive possibility, proposed long ago by Coleman and Weinberg [1, 2], is that there is no tree level scalar mass altogether –perhaps because of some underlying conformal symmetry– and that EWSB is caused by radiative corrections. In this article we study a very simple extension of the Standard Model that lies the origin of electroweak symmetry in the existence of a dark matter candidate and its SU(2) partners and their one-loop contribution. This scenario ala Coleman Weinberg can give a Higgs mass above the experimental value MH > 114.4 GeV together with a Dark Matter abundance consistent with cosmological observations, Ωh2 ≈ 0.12 [12]
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