Higgs decays displaced from the primary interaction vertex represent a striking experimental signature that is actively searched for by ATLAS, CMS and LHCb collaborations. We point out signals of this type appear in context 2HDM+$a$ model if mixing angle $\theta$ two CP-odd weak spin-0 eigenstates tiny dark matter (DM) sector either decoupled or kinematically inaccessible. Utilising suitable be...

We study the discovery potential of non-Standard Model (SM) heavy Higgs bosons in Two-Higgs-Doublet Models (2HDMs) at a multi-TeV muon collider and explore discrimination power among different types 2HDMs. find that pair production non-SM via universal gauge interactions is dominant mechanism once above kinematic threshold. Single boson associated with fermions could be important parameter regi...

RGEs for coefficients of dim-5 operators giving rise to neutrino masses in the seesaw mechanism are written down in the SM, 2HDM and MSSM, and solved numerically. RG evolution of these coefficients modifies tree-level seesaw predictions for neutrino masses and mixing angles in SO(10)-type GUT models as strongly as quark Yukawa coupling evolution. ZU-TH 20/93 DFPD 93/TH/44 ∗ Supported in part by...