• $U_{e}(1)$-covariant $R_{\xi}$ gauge for the two-Higgs doublet model

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      https://www.ias.ac.in/article/fulltext/pram/073/06/1023-1039

    • Keywords

       

      Nonlinear gauges; extended Higgs sectors; Becchi–Rouet–Stora–Tyutin symmetry.

    • Abstract

       

      A $U_{e}(1)$-covariant $R_{\xi}$ gauge for the two-Higgs doublet model based on BRST (Becchi–Rouet–Stora–Tyutin) symmetry is introduced. This gauge allows one to remove a significant number of nonphysical vertices appearing in conventional linear gauges, which greatly simplifies the loop calculations, since the resultant theory satisfies QED-like Ward identities. The presence of four ghost interactions in these types of gauges and their connection with the BRST symmetry are stressed. The Feynman rules for those new vertices that arise in this gauge, as well as for those couplings already present in the linear $R_{\xi}$ gauge but that are modified by this gauge-fixing procedure, are presented.

    • Author Affiliations

       

      C G Honorato1 J J Toscano1 2

      1. Facultad de Ciencias Físico Matemáticas, Benémerita Universidad Autónoma de Puebla, Apartado Postal 1152, Puebla, Puebla, México
      2. Instituto de Física y Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo,Edificio C-3, Ciudad Universitaria, C.P. 58040, Morelia, Michoácan, México
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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