First results of MC studies of the process e+e- -> H(ZZ*), Z -> jj and Z* -> m+m-/e+e- at 250 GeV on ILC

This paper is devoted to modeling the process e+e- → ZH with subsequent decays H → ZZ*, Z → jj, Z* → m+m-/e+e- at the future International Linear Collider (ILC).The corresponding signal can be measured using the mass difference distribution M(jjℓℓ)- M(jj) + M(Z) in the Higgs boson mass region. From an experimental viewpoint, the resolution of the signal includes the width of Z boson, which nevertheless should give a narrow peak in the mass difference compared to a direct measurement of the Higgs boson mass. The study of this channel can be used to determine the width, mass, and coupling constants of the Higgs boson.