### Speaker

### Description

A general two Higgs doublet model is employed to study flavor changing

neutral Higgs (FCNH) interactions in pp collisions.

We investigate the discovery potential of

(a) a flavor changing neutral Higgs boson decays into leptons,

$pp \to \phi^0 \to \tau^\mp\mu^\pm +X$ from gluon fusion, and

(b) production of a flavor changing neutral Higgs boson associated with a top quark $pp \to t \phi^0 +X$, where $\phi^0$ could be a CP-even scalar ($h^0$, $H^0$) or a CP-odd pseudoscalar ($A^0$).

The light Higgs boson $h^0$ is found to resemble closely the standard Higgs boson at the Large Hadron Collider (LHC). In the alignment limit of $\cos(\beta-\alpha) \simeq 0$, for $h^0$--$H^0$ mixing, FCNH couplings of $h^0$ are naturally suppressed, but such couplings of the heavier $H^0, A^0$ are sustained by $\sin(\beta-\alpha) \simeq 1$.

We evaluate physics backgrounds from dominant processes

with realistic acceptance cuts and tagging efficiencies.

We find promising results for the LHC with $\sqrt{s} = 14$ TeV,

and future pp colliders with $\sqrt{s} = 27$ TeV and 100 TeV