  The origin of the baryon asymmetry of the universe (BAU) is a longstanding
problem in the high energy physics. The electroweak baryogenesis mechanism,
which generates the BAU during the first order electroweak phase transition,
provides a testable solution to this problem. In this paper we revisit the
top-assisted electroweak baryogenesis model, which extends the standard model
(SM) with only one scalar singlet. Constraints on the new CP-violating coupling
as well as the mixing between the SM Higgs and the new scalar singlet are
derived by considering the latest result of ACME and oblique observables.
Furthermore, we derive constraints on these two parameters arising from the
data of Higgs measurement at the LHC as well as the four top-quark production
at the LHC.
