---
abstract: 'The minimal supersymmetric standard model involves a rather restrictive Higgs potential with two Higgs fields. Recently, the full set of classes of symmetries allowed in the most general two Higgs doublet model was identified; these classes do not include the supersymmetric limit as a particular class. Thus, a physically meaningful definition of the supersymmetric limit must involve the interaction of the Higgs sector with other sectors of the theory. Here we show how one can construct basis invariant probes of supersymmetry involving both the Higgs sector and the gaugino-higgsino-Higgs interactions.'
author:
- 'P. M. Ferreira'
- 'Howard E. Haber'
- 'João P. Silva'
title: 'Basis invariant conditions for supersymmetry in the two-Higgs-doublet model'
---

SCIPP-10/01\

\[sec:intro\]Introduction
=========================

The Standard Model (SM) of electroweak interactions has provided an extraordinarily successful description of currently observed particle physics phenomena. Nevertheless, there are strong reasons to expect that new physics beyond the Standard Model must emerge, ranging from the hierarchy problem and the unification of all coupling constants, to baryogenesis and dark matter. One of the leading candidates for physics beyond the SM incorporates supersymmetry near the scale of electroweak symmetry breaking in order to provide a natural explanation for the existence 