Speaker
Ezequiel Rodriguez
(Universidad de Sonora)
Description
We analyse the gauge symmetry breaking and the vacuum stability conditions of an S(3)-invariant extension of the Standard Model. The description of electroweak symmetry breaking is more involved because the theory has three complex SU(2) doublet Higgs fields (H1,H2) and HS, that belong to a singlet and a doublet representation of the S(3)-flavour group respectively.
We find that the Higgs potential has three types of minima: a normal minimum, an electric charge breaking (CB) minimum and a CP violating (CPB) one, according to the vacuum expectation values of the Higgs fields H1, H2 and HS. Assuming that the non-vanishing vev of the SU(2)L Higgs doublet in the singlet representation of S3 is real, we obtain that the deepest minimum is the normal one. This condition gives rise to the Pakvasa-Sugawara minimum, where there is an S(2) residual symmetry. This feature simplifies the structure, and
therefore the computation, of the Higgs mass matrices. We present also some results on the mass spectrum of the Higgs bosons in the theory.
Authors
Ezequiel Rodriguez
(Universidad de Sonora)
Dr
Myriam Mondragon
(Instituto de Fisica UNAM)
Dr
Olga Felix-Beltran
(Facultad de Ciencias de la electronica BUAP)
