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Radiative Corrections to e+e− → Zh at Future Higgs Factory in the Minimal Dilaton Model

The minimal dilaton model (MDM) extends the Standard Model by one singlet scalar called dilaton and one top quark partner called t′. In this work we investigate the t′-induced radiative correction to the Higgs-strahlung production process e+e− → Zh at future Higgs factory. We first present the analytical calculations in detail and show how to handle the ultraviolet divergence. Then we calculate the correction numerically by considering the constraints from precision electroweak data. We find that, for sinθL = 0.2 and mt′ = 1200 GeV, the correction is 0.26% and 2.1% for , 1 TeV respectively, and a larger value can be achieved as sin θL increases.