Scalar dark matter multiplet of global O(N) symmetry

• DOI: 10.1007/jhep02(2025)135
• Publication Date: 2025-02-20T19:47:47Z
• Authors: U-Rae Kim; Jungil Lee; Soo-hyeon Nam
• Keywords: Multiplet

A bstract We study two types of models involving a scalar dark matter multiplet global O ( N ) symmetry. These are distinguished by the absence (Type I) or presence II) mediator with Z 2 derive allowed regions for mass and new couplings based on constraints from Higgs invisible decay, relic abundance matter, spin-independent matter-nucleon scattering cross section. Within parameter space, we also discuss vacuum stability potential perturbativity in both models. find that Type I model cannot achieve stable electroweak vacuum, whereas II can have perturbative up to Planck scale.