### Abstract

We evaluate the expected measurement accuracy of the branching ratio of the Standard Model Higgs boson decaying into tau lepton pairs h → τ^{+}τ^{−} at the ILC with a center-of-mass energy of √s = 500 GeV with a full simulation of the ILD detector. We assume a Higgs mass of M_{h} = 125 GeV, a branching ratio of BR(h → τ^{+}τ^{−}) = 6.32 %, beam polarizations of P (e^{−}, e^{+}) = (−0.8, +0.3), and an integrated luminosity of ∫ L dt = 500 fb^{−1}. The Higgs-strahlung process e^{+}e^{−} → Zh with Z → qq and the W W-fusion process e^{+}e^{−} → ννh are expected to be the most sensitive channels at √s = 500 GeV. Using a multivariate analysis technique, we estimate the expected relative measurement accuracy of the branching ratio ∆(σ · BR)/(σ · BR) to be 4.7% and 7.4% for the qqh and ννh final states, respectively. The results are cross-checked using a cut-based analysis.

Original language | English |
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Publication status | Published - 2013 |

Event | 2013 International Workshop on Future Linear Colliders, LCWS 2013 - Tokyo, Japan Duration: Nov 11 2013 → Nov 15 2013 |

### Conference

Conference | 2013 International Workshop on Future Linear Colliders, LCWS 2013 |
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Country | Japan |

City | Tokyo |

Period | 11/11/13 → 11/15/13 |

### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics

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## Cite this

*Full simulation study of the higgs branching ratio into tau lepton pairs at the ILC with √s = 500 GeV*. Paper presented at 2013 International Workshop on Future Linear Colliders, LCWS 2013, Tokyo, Japan.