Higgs-strahlung production process e+e- → hZ at the future Higgs factory in the SM extension with color-octet scalars

We investigate the Higgs-strahlung production process e(+)e(-) --> hZ at the future Higgs factory in the Manohar-Wise model, which extends the SM by a family of color-octet and isospin-doublet scalars. We scan over the parameter space of the Manohar-Wise model considering the theoretical and experimental constraints from unitarity, electroweak data and LHC searches for the color-octet scalars and perform fits with the Higgs data from ATLAS and CMS. Then we calculate the cross section sigma(e(+)e(-) --> hZ) at root s = 240 GeV by including the radiative corrections from loops mediated by color-octet scalars. We find that the deviation of the cross section in the Manohar-Wise model from its SM prediction can maximally reach 11%, and the large deviations are mainly due to the potentially large coupling of Higgs boson with CP-odd color-octet scalars S-I(A) (i.e., the coupling hS(I)(A)*S-I(B)). (C) 2016 The Physical Society of the Republic of China (Taiwan). Published by Elsevier B.V. All rights reserved.