Theory Colloquia
On the possible links between Electroweak Symmetry Breaking and Dark Matter
by
→
Europe/Zurich
TH Theory Conference Room (CERN)
TH Theory Conference Room
CERN
Description
The Weakly Interacting Massive Particle scenario of Dark Matter, which is the most straightforward scenario for explaining dark matter in the Universe, requires that the Dark Matter particle mass lies in a range astonishingly close to the electroweak scale. This suggests that there might be a close relation between these two scales. Furthermore this leads to the question: could the presence of the Dark Matter particle around the electroweak scale, play an important role in the origin of Electroweak Symmetry Breaking?
After looking at how close are these two scales, four mechanisms where Dark Matter and Electroweak Symmetry Breaking are related at various levels will be considered: i) first the usual neutralino susy dark matter scenario will be briefly considered along this perspective. ii) second in a version of the inert two Higgs doublet model it will be shown that DM can change importantly the electroweak precision measurement expectations for the Higgs boson mass. iii) third it will be shown how, in various models, the DM mass can be proportional to the electroweak scale, providing an explanation for the similarity of both scales. iv) fourth, based on the assumption of scale invariance, another version of the inert Higgs model will be considered where, in addition of having both scales proportional to each other, the presence of dark matter is at the origin of electroweak symmetry breaking. The hierarchy problem issue will also be discussed in each model.
Organised by
Christophe Grojean