We use cookies to ensure that we give you the best experience on our website. You can change your cookie settings at any time. Otherwise, we'll assume you're OK to continue.

Department of Mathematical Sciences

# Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

## CPT Student Seminar: Classical scale invariance in the inert doublet model

Presented by Alexis Plascencia, Durham University

29 June 2015 17:00 in OC218

The Inert Doublet Model (IDM) is a minimal extension of the Standard Model that can account for the dark matter in the universe. In this work we study a classically scale invariant version of the IDM with a minimal hidden sector, which has a $U(1)_{\text{CW}}$ gauge symmetry and a complex scalar $\Phi$. The mass scale is generated in the hidden sector via the Coleman-Weinberg mechanism and communicated to the two Higgs doublets via portal couplings. Since the CW scalar acquires a vev and mixes with the Standard Model Higgs boson, we analyse the impact of adding this CW scalar and the $Z'$ gauge boson on the calculation of the relic density and on the spin independent nucleon cross section for direct detection experiments. Finally, by studying the RG equations we find that some points in parameter space remain valid all the way up to the Planck scale.