Speaker
Description
The existence of Higgs-like scalars, which could be produced at
electron-positron collider in association with a Z boson, is predicted
by many BSM models and, assuming a small
coupling to the Z boson, still not excluded by experimental data.
Prospects for discovering such an scalar at future Higgs
factories have been studied by different methods.
The most model-independent one is based on the recoil of the new
particle against the Z, since this is independent of the decay modes of the new scalar.
Based on this method, searches were performed for any mass of the
scalar and for two different decays of the Z boson, to a pair of
muons and to a pair of electrons. The combination of the limits obtained
by the two Z decay modes was also performed.
For detector-level simulations, the study takes the ILD detector concept
and ILC parameters at 250 GeV as example. Full simulated background samples
were used by the study, while for signal samples the SGV fast simulation,
adapted to the ILD, was used for detector simulation and high-level reconstruction.
