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arXiv · 1707.04595

One-loop considerations for coexisting vacua in the CP conserving 2HDM

A. L. Cherchiglia·C. C. Nishi
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Abstract

The Two-Higgs-Doublet model (2HDM) is a simple and viable extension of the Standard Model (SM) with a scalar potential complex enough that two minima may coexist. In this work we investigate if the procedure to identify our vacuum as the global minimum by tree-level formulas carries over to the one-loop corrected potential. In the CP conserving case, we identify two distinct types of coexisting minima --- the regular ones (moderate $\tanβ$) and the non-regular ones (small or large $\tanβ$) --- and conclude that the tree level expectation fails only for the non-regular type of coexisting minima. For the regular type, the sign of $m^2_{12}$ already precisely indicates which minima is the global one, even at one-loop.

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A. L. Cherchiglia, C. C. Nishi. 2017-11-04. One-loop considerations for coexisting vacua in the CP conserving 2HDM. https://doi.org/10.1007/jhep11(2017)106

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