Full simulation study of the top Yukawa coupling at the ILC at $\sqrt{s}$ = 1 TeV

TL;DR

This study estimates that the top Yukawa coupling can be measured with approximately 4% precision at the ILC operating at 1 TeV, using detailed detector simulations and specific beam polarization settings.

Contribution

It provides a detailed simulation-based analysis of the expected measurement precision of the top Yukawa coupling at the ILC, highlighting the potential accuracy with 1 ab^{-1} luminosity.

Findings

Estimated 4% statistical precision for yt measurement.

Analysis based on detailed simulations of SiD and ILD detectors.

Focus on ttH final states with at least six jets.

Abstract

We present a study of the expected precision for measurement of the top Yukawa coupling, yt, in e+e- collisions at a center-of-mass energy of 1 TeV and assuming a beam polarization of P (e-, e+) = (-0.8,+0.2). Independent analyses of ttH final states containing at least six hadronic jets are performed, based on detailed simulations of SiD and ILD, the two candidate detector concepts for the ILC. We estimate that a statistical precision of yt of 4% can be obtained with an integrated luminosity of 1 $\mathrm{ab}^{-1}$.