Complex Singlet Extension of the Standard Model

Details Complex Singlet Extension of the Standard Model Complex Singlet Extension of the Standard Model

2008-11-03

arxiv.org/abs/0811.0393v2

Phys.Rev.D79:015018,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 10 figures, 1 table, PRD version

Scientific paper

10.1103/PhysRevD.79.015018

We analyze a simple extension of the Standard Model (SM) obtained by adding a complex singlet to the scalar sector (cxSM). We show that the cxSM can contain one or two viable cold dark matter candidates and analyze the conditions on the parameters of the scalar potential that yield the observed relic density. When the cxSM potential contains a global U(1) symmetry that is both softly and spontaneously broken, it contains both a viable dark matter candidate and the ingredients necessary for a strong first order electroweak phase transition as needed for electroweak baryogenesis. We also study the implications of the model for discovery of a Higgs boson at the Large Hadron Collider.

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