Regular Article - Theoretical Physics
Nondecoupling in multi-Higgs doublet models
Departamento de Física and Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico (IST), U. de Lisboa (UL), Av. Rovisco Pais, 1049-001, Lisboa, Portugal
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Accepted: 7 July 2020
Published online: 17 July 2020
We consider models with any number of Higgs doublets and study the conditions for decoupling. We show that, under very general circumstances, all the quadratic coefficients of the scalar potential must be present, except in special cases, which include terms related to directions of vanishing vacuum expectation values. We give a few examples. Moreover, we show that the decoupling of all charged scalars implies the decoupling of all extra neutral scalars and vanishing violation in scalar-pseudoscalar mixing.
© The Author(s), 2020