Scalar representations in the light of electroweak phase transition and cold dark matter phenomenology

• Published in: Journal of cosmology and astroparticle physics 2014-05, Vol.2014 (5), p.i-31
• Main Authors: AbdusSalam, Shehu S, Chowdhury, Talal Ahmed
• Format: Article
• Language: English
• Subjects: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; Cold dark matter; COMPARATIVE EVALUATIONS; Cosmology; Dark matter; HIGGS MODEL; Inert; Mathematical models; NONLUMINOUS MATTER; PHASE TRANSFORMATIONS; Phenomenology; Representations; Scalars; STANDARD MODEL; SYMMETRY; TEV RANGE; TRIPLETS
• ISSN: 1475-7516; 1475-7516
• DOI: 10.1088/1475-7516/2014/05/026

The extension of the standard model's minimal Higgs sector with an inert SU(2) sub()L scalar doublet can provide light dark matter candidate and simultaneously induce a strong phase transition for explaining Baryogenesis. There is however no symmetry reasons to prevent the extension using scalars with higher SU(2) sub()L representations. By making random scans over the models' parameters, we show that in the light of electroweak physics constraints, strong first order electroweak phase transition and the possibility of having sub-TeV cold dark matter candidate the higher representations arc rather disfavored compared to the inert doublet. This is done by computing generic perturbativity behavior and impact on electroweak phase transitions of higher representations in comparison with the inert doublet model. Explicit phase transition and cold dark matter phenomenology within the context of the inert triplet and quartet representations arc used for detailed illustrations.