2007/08/13 by S. W. Ham, S. K. Oh, S. K. OH · 2 citations
Mathematics · Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Electroweak interaction #Higgs boson #Higgs sector #Mathematics #Order (exchange) #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Phase (matter) #Phase transition #Physics #Quantum mechanics #Quark #Statistics #Supersymmetry #hep-ph
paper · pdf · doi:10.1103/physrevd.76.095018
published as Phys.Rev.D76:095018,2007
arxiv created 2007/08/13 · openalex publication_date 2007/11/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The possibility of a strongly first-order electroweak phase transition is established in the minimal supersymmetric standard model with an extra U(1)^\ensuremath', where a nontrivial CP violating phase is introduced in its Higgs sector. We find that there is some region in the parameter space of the model that allows the strongly first-order electroweak phase transition. The mass of the stop quark need not be smaller than the top quark mass to ensure the first-order electroweak phase transition be strong. The effect of the CP violating phase upon the strength of the phase transition is discovered. The strength of the phase transition is reduced when the size of the CP violation is increased. For a given CP violating phase, we find that the model has a larger mass for the lightest Higgs boson when it has a stronger phase transition.