Towards Reviving Electroweak Baryogenesis with a Fourth Generation | Zendy

W.-S. Hou | Zendy; Masaya Kohda | Zendy

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Towards Reviving Electroweak Baryogenesis with a Fourth Generation

Author(s) -

W.-S. Hou,

Masaya Kohda

Publication year - 2013

Publication title -

advances in high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.59

H-Index - 49

eISSN - 1687-7365

pISSN - 1687-7357

DOI - 10.1155/2013/769240

Subject(s) - baryogenesis , electroweak interaction , physics , particle physics , baryon asymmetry , higgs boson , standard model (mathematical formulation) , fermion , technicolor , nuclear physics , gauge boson , gauge theory , lepton , archaeology , gauge (firearms) , history , electron

Electroweak baryogenesis is an attractive scenario for explaining the baryon asymmetry of theuniverse. However, it does not work within the standard model due to two reasons: (1) the strength of CP violation from the Kobayashi-Maskawa mechanism with three generations is too small; (2) the electroweak phase transition is not first order for the experimentally allowed Higgs boson mass. We discuss possibilities to solve these problems by introducing a fourth generation of fermions and how electroweak baryogenesis might be revived. We also discuss briefly the recent observation of a Higgs-like boson with mass around 125 GeV, which puts the fourth generation in a difficult situation, and the possible way out

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