Branching ratio measurement of $h \to \mu ^+ \mu ^-$ at the ILC

TL;DR

This paper evaluates the potential to measure the Higgs boson's decay to muon pairs at the ILC, using detailed simulations at two energies to estimate the precision of this measurement.

Contribution

It provides a detailed simulation-based analysis of the measurement prospects for $h o \mu^+ \mu^-$ at the ILC at different energies and luminosities, which is a novel detailed feasibility study.

Findings

Estimated precision on $\sigma imes ext{BR}(h o \mu^+ \\mu^-)$ at 250 GeV and 500 GeV.

Analysis of two final states: $qar{q}h$ and $ uar{ u}h$.

Use of fully-simulated MC samples with the ILD detector model.

Abstract

We study the prospects of measurement of the branching ratio of $h \to \mu ^+ \mu ^-$ at the International Linear Collider (ILC). The study is performed at center-of-mass energies of 250 GeV and 500 GeV, using fully-simulated MC samples with the International Large Detector (ILD) model. For both center-of-mass energies, the two final states $q\overline{q}h$ and $\nu \overline{\nu}h$ have been analyzed. For an integrated luminosity of 2000 fb$^{-1}$ at 250 GeV and 4000 fb$^{-1}$ at 500 GeV, corresponding to the H20 running scenario as well as its staged version, the precision on $\sigma \times \mathrm{BR}(h \to \mu ^+ \mu ^-)$ is estimated.