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Electroweak phase transition in the economical 3-3-1 model (1409.0750v5)

Published 2 Sep 2014 in hep-ph

Abstract: We consider the EWPT in the economical 3-3-1 (E331) model. Our analysis shows that the EWPT in the model is a sequence of two first-order phase transitions, $SU(3) \rightarrow SU(2)$ at the TeV scale and $SU(2) \rightarrow U(1)$ at the $100$ GeV scale. The EWPT $SU(3) \rightarrow SU(2)$ is triggered by the new bosons and the exotic quarks; its strength is about $1 - 13$ if the mass ranges of these new particles are $102 \,\mathrm{GeV} - 103 \,\mathrm{GeV}$. The EWPT $SU(2) \rightarrow U(1)$ is strengthened by only the new bosons; its strength is about $1 - 1.15$ if the mass parts of $H0_1$, $H\pm_2$ and $Y\pm$ are in the ranges $10 \,\mathrm{GeV} - 102 \,\mathrm{GeV}$. The contributions of $H0_1$ and $H{\pm}_2$ to the strengths of both EWPTs may make them sufficiently strong to provide large deviations from thermal equilibrium and B violation necessary for baryogenesis.

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