Prospects of measuring the branching fraction of the Higgs boson decaying into muon pairs at the International Linear Collider

TL;DR

This study evaluates the potential of the International Linear Collider to measure the Higgs boson's decay into muon pairs, estimating a 17% precision with full detector simulations at specified energies and luminosities.

Contribution

It provides a detailed simulation-based assessment of measuring the Higgs to muon pairs at the ILC, including the impact of detector resolution on measurement precision.

Findings

Estimated 17% precision on Higgs to muon decay measurement.

Analysis at two energies: 250 GeV and 500 GeV.

Impact of transverse momentum resolution on measurement accuracy.

Abstract

The prospects for measuring the branching fraction of $H \to \mu ^+ \mu ^-$ at the International Linear Collider (ILC) have been evaluated based on a full detector simulation of the International Large Detector (ILD) concept, considering centre-of-mass energies ($\sqrt{s}$) of 250 GeV and 500 GeV. For both $\sqrt{s}$ cases, the two final states $e^+ e^- \to q\overline{q}H$ and $e^+ e^- \to \nu \overline{\nu}H$ have been analyzed. For integrated luminosities of 2 ab$^{-1}$ at $\sqrt{s} = 250$ GeV and 4 ab$^{-1}$ at $\sqrt{s} = 500$ GeV, the combined precision on the branching fraction of $H \to \mu ^+ \mu ^-$ is estimated to be 17{\%}. The impact of the transverse momentum resolution for this analysis is also studied.