The electroweak phase transition is considered in the framework of the reduced minimal 3-3-1 model. The structure of the phase transition in this model is divided into two parts. The first part is the phase transition $\mathrm{SU}(3)\to \mathrm{SU}(2)$ at the TeV scale, and the second is $\mathrm{SU}(2)\to \mathrm{U}(1)$, which is like the standard model electroweak phase transition. When the mass of the neutral Higgs boson ($h_1$) is taken to be equal to the LHC value, $m_{h_1}=125\mathrm{GeV}$, these phase transitions are first-order transitions; the mass of $Z_2$ is about 4.8 TeV, and we find the region of parameter space with the first-order phase transition at the $v_{{\mathrm{<ruby><rb>\rho </rb><rt>ろー</rt></ruby>}}_0}=246\mathrm{GeV}$ scale, leading to an effective potential where the mass of the charged Higgs boson is in the range $3.258\mathrm{TeV}<m_{h_{++}}<19.549\mathrm{TeV}$. Therefore, with this approach new bosons are the triggers of the first-order electroweak phase transition, which provides significant implications for the viability of electroweak baryogenesis scenarios.

• Received 3 September 2013

DOI:https://doi.org/10.1103/PhysRevD.88.096009