The Wrong Sign limit in the 2HDM
  A sign change in the Higgs couplings to fermions and massive gauge bosons is still allowed in the framework of two-Higgs doublet models (2HDM). In this work we discuss the possible sign changes in the Higgs couplings to fermions and gauge bosons, while reviewing the status of the 8-parameter CP-conserving 2HDM after the Large Hadron Collider 8 TeV run. 
P.M. Ferreira, Renato Guedes, John F. Gunion, Howard E. Haber, Marco   O. P. Sampaio and Rui Santos
hep-ph