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Electroweak baryogenesis in the MSSM with vectorlike superfields

Xue Chang1,* and Ran Huo2,†

  • 1State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190, China
  • 2Kavli IPMU (WPI), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan

  • *chxue@itp.ac.cn
  • cran.huo@ipmu.jp

Phys. Rev. D 89, 036005 – Published 14 February, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.036005

Abstract

Introducing heavy particles with strong couplings to the Higgs field can strengthen electroweak phase transition through the entropy release mechanism from both bosons and fermions. We analyze the possibility of electroweak baryogenesis in the minimal supersymmetric Standard Model (MSSM) with new vectorlike superfields. The new vectorlike particles belong to the representation 5+5¯+10+10¯ of SU(5). By analyzing in detail the effective potential at finite temperature, we show that a strongly first-order electroweak phase transition in this model is ruled out by a combination of the 125 GeV Higgs requirement, the bound for exotic quarks, the gluon fusion Higgs production rate, and the Higgs diphoton decay rate, as well as the electroweak precision measurement.

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