Stability of the tree-level vacuum in two Higgs doublet models against charge or CP spontaneous violation
P. M. Ferreira, R. Santos, A. Barroso
Abstract
We show that in two Higgs doublet models at tree-level the potential minimum preserving electric charge and CP symmetries, when it exists, is the global one. Furthermore, we derived a very simple condition, involving only the coefficients of the quartic terms of the potential, that guarantees spontaneous CP breaking.
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