Higgs boson hadronic branching ratios at the ILC

Abstract

We present a study of the Higgs boson decay branching ratios to $b\bar{b}$, $c\bar{c}$ and gluons, one of the cornerstones of the physics program at the International Linear Collider (ILC). A standard model Higgs boson of 120\,GeV mass, produced in the Higgs-strahlung process at $\sqrt{s}=250$\,GeV was investigated using the full detector simulation and reconstruction procedures. The analysis was performed in the framework of the Silicon Detector (SiD) concept with full account of inclusive standard model backgrounds. The selected decay modes contained two heavy flavour jets in the final state and required excellent flavour tagging through precise reconstruction of interaction and decay vertices in the detector. A new signal discrimination technique using correlations of neural network outputs was used to determine the branching ratios and estimate their uncertainties, 4.8\%, 8.4\% and 12.2\% for $b\bar{b}$, $c\bar{c}$ and gluons respectively.

9 Pages, 5 figures and 5 tables

References in corpus (4)

• PYTHIA 6.4 Physics and Manual
• The LCFIVertex package: vertexing, flavour tagging and vertex charge reconstruction with an ILC vertex detector
• Measurement of the Higgs boson decay branching ratio to charm quarks at the ILC
• Precision measurement of Higgs decay branching ratios to bottom quarks and gluons at the ILC

Cited by in corpus (2)

• Physics at the e+ e- Linear Collider
• Evaluation of measurement accuracies of the Higgs boson branching fractions in the International Linear Collider