Title: Democratic three Higgs-doublet models: the custodial limit and wrong-sign Yukawa couplings

Speaker: Ipsita Saha (Allahabad University)

Gmeet Link: https://meet.google.com/xyc-eifm-run

Abstract: I will discuss two novel aspects of democratic 3HDMs -- the custodial limit and the possibility of wrong-sign Yukawa couplings. I will first discuss some general implications of the custodial symmetry in multi-Higgs doublet models. In the custodial limit, the democratic 3HDMs will easily negotiate the constraints from the electroweak T-parameter. Additionally, I will also discuss the possibility of having wrong-sign Yukawa couplings in democratic 3HDMs, as in the case of 2HDMs thereby highlighting the importance of reporting LHC analysis in the kappa-formalism without any implicit assumptions on the signs of the kappas. I will also deliberate on some possible future directions to pursue.