Abstract
We discuss the status of the Inert Doublet Model, a two-Higgs doublet model that obeys a discrete Z 2 symmetry and provides a dark matter candidate. We discuss all current theoretical and experimental constraints on the model as well as discovery prospects at current and future colliders.
Highlights
The Inert Doublet Model (IDM) [1,2,3] is an intriguing extension of the Standard Model (SM) scalar sector which features a dark matter candidate
For masses mH ≥ 62.5 GeV, major constraints stem from an interplay of electroweak constraints as well as direct detection limits. The former mainly determine the maximally allowed mass splitting between the dark scalars, while the latter set an upper limit on the maximally allowed value of λ345. We exemplarily show this in figure 1, where we display allowed points in the plane of scalar mass differences as well as in the mH ; λ345 plane
IDM at colliders Hadron colliders: The main production channels at hadron colliders correspond to the Drell-Yan production of an HA or H H± pair, followed by the predominant decay chains A → Z H; H± → W ±H and leading to a signature of gauge boson(s) and missing transverse energy, with on- or offshell electroweak gauge bosons depending on the kinematic configuration and available phase space
Summary
The Inert Doublet Model (IDM) [1,2,3] is an intriguing extension of the Standard Model (SM) scalar sector which features a dark matter candidate It is a two Higgs doublet model with the scalar potential. Experimental and theoretical constraints Here we list the constraints applied in our studies (see refs [8, 26, 29] for more details): Theoretical constraints: included are positivity of the potential [31], condition to be in the inert vacuum [32]1 and perturbative unitarity [33,34] Some of these constraints are tested via the publicly available two-higgs doublet model calculator (2HDMC) tool [35]. For parameter points where mH ≤ 62.5 GeV, we refer the reader to [15, 23, 26, 29] for a more detailed discussion
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