1. Relic density of dark matter in the inert doublet model beyond leading order for the low mass region: 2. Co-annihilation
- Author
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Banerjee, Shankha, Boudjema, Fawzi, Chakrabarty, Nabarun, Sun, Hao, CERN Theoretical Physics Department, CERN [Genève], Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Indian Institute of Science [Bangalore] (IISc Bangalore), Dalian University of Technology, and Malaval, Virginie
- Subjects
[PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,Particle Physics - Experiment ,Particle Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
We examine the relic density of the light mass dark matter region in the inert doublet model (IDM) when the dominant process is due to co-annihilation between the lightest neutral scalars of the model. The full one-loop electroweak corrections are computed in an on-shell scheme and are found to be well approximated as an effective cross-section expressed in terms of $Z$-observables. The electroweak corrections to the subdominant process which consists of an annihilation into an on-shell $W$ and an off-shell $W$, that is calculated as a annihilation into a 3-body final state, is also performed. The latter reveals an important dependence on a parameter that describes the self-interaction of the new scalars (solely within the dark sector), a parameter which is not accessible in tree-level calculations of standard model (SM)-IDM interactions., v1: 14 pages, 9 figures and 2 tables
- Published
- 2021