ILC Workshop on Potential Experiments (ILCX2021)

Measurement of σ(e+e−→HZ)×Br(H→ZZ∗) at the 250 GeV ILC

28 Oct 2021, 15:30

20m

Room #2 (Zoom Meeting ID: 823 6921 2312)

Oral presentation using Zoom Session F: Higgs properties F-3: Higgs properties

Speaker

Mr Evgeny Antonov (Lebedev Physical Institute of the Russian Academy of Sciences)

Description

We report on studies of the $e^{+}{e}^{-}\to HZ$ process with the subsequent decay of the Higgs boson $H\to Z{Z}^{\star }$, where the $Z{Z}^{\star }$ 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 ${\mathcal{P}}_{e^{-}{e}^{+}}=(-0.8,+0.3)$, and the center-of-mass energy $\sqrt{s}$ = 250 GeV. The analysis is also repeated for the case of two 0.9 ab${}^{-1}$ data samples with polarizations ${\mathcal{P}}_{e^{-}{e}^{+}}=(\mp 0.8,\pm 0.3)$. Contributions of the potential background processes are taken into account based on the available MC event samples. The $e^{+}{e}^{-}\to HZ$ process measurement allows to obtain the width of the Higgs boson in a model-independent approach.

Presentation materials

Antonov_Drutskoy_ILCX_28_Oct_2021.pdf