Unconventional phenomenology of a minimal two-Higgs-doublet model

de Visscher, Simon;Gérard, Jean-Marc;Herquet, Michel;Lemaitre, Vincent;Maltoni, Fabio
(2009) Journal of High Energy Physics — Vol. 0908, p. 42 (2009)

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Two-Higgs-doublet models (2HDM) are simple extensions of the Standard Model (SM) where the scalar sector is enlarged by adding a weak doublet. As a result, the Higgs potential depends in general on several free parameters which have to be carefully chosen to give predictions consistent with the current precision data. We consider a 2HDM invariant under a twisted custodial symmetry and depending only on three extra parameters beyond the SM ones. This model can naturally feature an inverted mass spectrum with a light pseudoscalar state and a heavy SM-like Higgs boson. We thoroughly analyze direct and indirect constraints and present a few unconventional though promising signatures at the LHC.
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de Visscher, S., Gérard, J.-M., Herquet, M., Lemaitre, V., & Maltoni, F. (2009). Unconventional phenomenology of a minimal two-Higgs-doublet model. Journal of High Energy Physics, 0908, 42. https://doi.org/10.1088/1126-6708/2009/08/042 (Original work published 2009)