Fine-tuning problem in a left-right symmetric model and Sogami's generalized covariant derivative method

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We study Sogami's generalized covariant derivative method for an 5(7(2)L, x SU(2)R x U(1)B-L x SU(3)c model that contains bi-doublet and triplet Higgs bosons. In particular, a detailed study is made on the minimization conditions of the Higgs potential. It is known that a minimization condition and certain phenomenology for an extra gauge boson mass yield a restriction on potential parameters, which require fine-tuning. We show that the restriction can be reduced to a condition of Yukawa coupling constants, giving a heavy mass of the right-handed tau neutrino in our model. We also discuss the consistency among parameter restrictions of our model by taking the phenomenology of the Higgs boson masses into account.

Original languageEnglish
Pages (from-to)187-209
Number of pages23
JournalProgress of Theoretical Physics
Issue number1
Publication statusPublished - 07-1997


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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