Higgs-strahlung production of the lightest CP-even Higgs boson at ILC in natural NMSSM

摘要

Considering various experimental constraints, we scan over the parameter space of the NMSSM by requiring the fine tuning measures Delta(Z) and Delta(h) are less than 50. Then in the allowed parameter space we investigate the Higgs-strahlung production of the lightest CP-even Higgs boson h(1) at ILC assuming the next-to-lightest CP-even Higgs boson acts as SM-like. we calculate the cross section of the process e(+)e(-) -> Zh(1) at ILC with center-of-mass energy of 250 GeV, and also discuss the decay patterns of h(1). We find that the cross section of the process e(+)e(-)-> Zh(1) can reach about 84 fb. Moreover, the cross section increases with the mass of h(1) and strongly depends on the Higgs doublet-component of h(1). For most of the surviving samples, h(1) mainly decays to bb. However, for certain regions of the surviving samples, the branching ratio of h(1) -> gamma gamma can maximally reach 2, which can be used to discriminate the NMSSM from MSSM. (C) 2017ThePhysicalSocietyoftheRepublicofChina(Taiwan). PublishedbyElsevierB. V. All rights reserved.