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Electroweak Baryogenesis with a Supersymmetric Sector

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arxiv 1305.1973 v1 pith:EYPJ62O2 submitted 2013-05-08 hep-ph

classification hep-ph
keywords electroweakbaryogenesiscomponentscouplingdiphotonhiggslargemass
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abstract

We study a model with an exotic new sector strongly coupled to the Higgs boson, in which supersymmetry is introduced to protect the quartic coupling from a large running and avoid potential vacuum stability problem. The fermionic components present vector like mass terms, through which the Higgs diphoton decay branching ratio can be tuned. The bosonic components trigger a strongly first order electroweak phase transition. We find a large parameter region of effective Yukawa coupling $y\gtrsim2$ and mass parameters $m_f\sim m_s$ of a few hundred GeV, that can simultaneously accommodate the diphoton excess and electroweak baryogenesis, without vacuum stability and electroweak precision measurement problems.

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