A revision of the Inert Doublet Model

par Laura López Honorez (Université Libre de Bruxelles)

jeudi 14 avr. 2011, 11:00 → 12:00 Europe/Paris

Auditorium M. Vivargent (LAPTH)

What is the true nature of dark matter? As of today this questions stays unanswered. The typical dark matter candidate is a fermion. Nothing prevents however the dark matter to be part of the scalar sector. In my talk I will focus on a rather simple an yet very rich model for scalar dark matter: The inert doublet model. This is a minimal extension of the standard Model including a weakly interacting scalar dark matter candidate, the inert Higgs. The latter is directly coupled to the standard Higgs and gauge bosons, while having no direct coupling to quarks or leptons. It represent an archetype for WIMP scalar dark matter, with interesting candidates and phenomenology in the GeV and TeV range. In particular, I will discuss how, taking into account annihilations into 3 body final states, the viable parameter space of the model is slightly modified next to W threshold. I will also show that some new viable parameter space can be reached above W threshold taking into account cancellations between the diagrams contributing to annihilations into gauge bosons. I will also discuss the prospects for direct and indirect detection searches.

Slides Lopez_Honorez