Measurement of sigma(e(+)e (-) -> HZ) x Br(H -> ZZ*) at the 250 GeV ILC

We report on studies of the e(+)e(-). HZ process with the subsequent decay of the Higgs boson H -> ZZ*, where the ZZ* combination is reconstructed in the final states with two jets and two leptons. The analysis is performed using Monte Carlo data samples obtained with detailed ILD detector simulation assuming the integrated luminosity 2 ab(-1), the beam polarizations Pe-e+ = (-0.8, +0.3), and the center-of-mass energy root s = 250 GeV. The analysis is also repeated for the case of two 0.9 ab(-1) data samples with polarizations Pe-e+ = (-/+ 0.8, +/- 0.3). The process is measured in four decay channels, which correspond to two combinations for the Higgs final states and two decay modes of the directly produced Z boson, Z -> q (q) over bar and Z -> nu(nu) over bar To obtain the Higgs boson mass distributions, we used the variables M(jjll) and M-Delta = M(jjll) - M(jj) + M(Z(nom)), where M(Z(nom)) = 91.2 GeV. Contributions of the potential background processes are taken into account based on the available MC event samples. We propose a model-independent method for obtaining the width of the Higgs boson using the measurement of the e(+)e(-) -> HZ process.