Well-tempered n-plet dark matter

Aoife Bharucha (1, 2) , Felix Brümmer (3) , R. Ruffault (3)

1 CPT - Centre de Physique Théorique - UMR 7332
2 CPT - E1 Physique des particules
3 LUPM - Laboratoire Univers et Particules de Montpellier

We study simple effective models of fermionic WIMP dark matter, where the dark matter candidate is a mixture of a Standard Model singlet and an n-plet of SU(2) with n >= 3, stabilized by a discrete symmetry. The dark matter mass is assumed to be around the electroweak scale, and the mixing is generated by higher-dimensional operators, with a cutoff scale > 1 TeV. For appropriate values of the mass parameters and the mixing we find that the observed dark matter relic density can be generated by coannihilation. Direct detection experiments have already excluded large parts of the parameter space, and the next-generation experiments will further constrain these models.

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]

Aoife Bharucha, Felix Brümmer, R. Ruffault. Well-tempered n-plet dark matter. Journal of High Energy Physics, 2017, 2017 (9), ⟨10.1007/JHEP09(2017)160⟩. ⟨hal-01638326⟩