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<p>A comprehensive study of triple Higgs boson production in the 4<i>τ</i>2<i>b</i> decay final state is performed for the first time at a future 100 TeV hadron collider. The analysis incorporates modified Higgs self-couplings via trilinear Higgs self-coupling <i>c</i><sub>3</sub> and quartic Higgs self-coupling <i>d</i><sub>4</sub>, enabling a model-independent investigation of potential new physics effects. Higgs bosons are reconstructed using both resolved and boosted techniques. To optimize sensitivity across different kinematic regions, we introduce a novel event categorization strategy based on the triple Higgs invariant mass spectrum and the multiplicity of boosted Higgs bosons. In addition to a traditional cut-based analysis, a Boosted Decision Tree (BDT) approach is employed to exploit multivariate correlations among kinematic observables, leading to a significant improvement in sensitivity. Our result demonstrates that the 4<i>τ</i>2<i>b</i> channel provides a viable pathway for probing the Higgs quartic coupling, complementing the existing multi-Higgs production studies, and could reach 5 <i>σ</i> in significance for <i>c</i><sub>3</sub> ≲ −1 and <i>d</i><sub>4</sub> ≳ 10 in the scanned range.</p>

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Probing triple Higgs production via 4τ2b decay channel at a 100 TeV hadron collider

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月5日

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  • Zhenyu Dong,
  • Xiaohu Sun,
  • Botao Guo,
  • Licheng Zhang,
  • Zhiyuan Li,
  • Jin Wang,
  • Zhe Li,
  • Yong Ban,
  • Yajun Mao

摘要

A comprehensive study of triple Higgs boson production in the 4τ2b decay final state is performed for the first time at a future 100 TeV hadron collider. The analysis incorporates modified Higgs self-couplings via trilinear Higgs self-coupling c3 and quartic Higgs self-coupling d4, enabling a model-independent investigation of potential new physics effects. Higgs bosons are reconstructed using both resolved and boosted techniques. To optimize sensitivity across different kinematic regions, we introduce a novel event categorization strategy based on the triple Higgs invariant mass spectrum and the multiplicity of boosted Higgs bosons. In addition to a traditional cut-based analysis, a Boosted Decision Tree (BDT) approach is employed to exploit multivariate correlations among kinematic observables, leading to a significant improvement in sensitivity. Our result demonstrates that the 4τ2b channel provides a viable pathway for probing the Higgs quartic coupling, complementing the existing multi-Higgs production studies, and could reach 5 σ in significance for c3 ≲ −1 and d4 ≳ 10 in the scanned range.