Activity

Probing Top-quark changing neutral Higgs couplings at Colliders

With the absence of New Physics so far at the LHC or elsewhere, we argue that a general two Higgs doublet model (g2HDM) with extra Yukawa couplings is the most likely New Physics. We show that the H, A and H+ bosons can be sub-TeV in mass, while well hidden from view so far by 

1) fermion mass-mixing hierarchy,

2) alignment (small h(125)-H mixing) and

3) (mysteriously) near-diagonal d-type extra Yukawa coupling matrix.

We give a general perspective on search strategies at the LHC, where we emphasize top-changing neutral Higgs coupling (TCNH) effects, hence advocate the production processes of cg -> tH/A -> ttc(bar), ttt(bar) and cg -> bH+ -> btb(bar), and urge for experimental search.

Coming Soon!