Branching ratio study of ZH->qqcc/qqbb

TL;DR

This paper evaluates the precision of measuring the Higgs boson’s branching ratio in ZH->qqcc/qqbb decays at the ILC, demonstrating a 13.68% accuracy in the ratio of H->cc to H->bb at 120 GeV.

Contribution

It presents a cut-based analysis method for measuring Higgs branching ratios at the ILC, focusing on the ZH->qqH decay mode with detailed simulation.

Findings

Estimated measurement accuracy of 13.68% for BR(H->cc)/BR(H->bb)

Analysis performed at Higgs mass of 120 GeV and 250 GeV center-of-mass energy

Utilized the ILD detector model for simulation

Abstract

Precise measurement of the Higgs boson properties is an important issue of the International Linear Collider (ILC) experiment to verify the particles mass generation mechanism that the coupling strength between the Higgs boson and the fermions or vector bosons are proportional to the mass of each particle. Thus the measurement of the branching ratio of the Higgs boson an important issue to understand the mass of each particle. In this analysis, measurement accuracy of the Higgs boson branching ratio in the ZH->qqH hadronic decay mode was studied with the cut-based analysis in Higgs mass of M_{H}=120 GeV at the center-of-mass energy of \sqrt{s}=250 GeV with the ILD detector model. From the analysis, we estimate the measurement accuracy of the relative Higgs boson branching ratio of BR(H->cc)$ to BR(H->bb) as 13.68\%.