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<p>We establish constraints on the dimension-six four-heavy-quark operators in the Standard Model Effective Field Theory (SMEFT) by synthesising LHC measurements of top-quark and single-Higgs production with electroweak precision observables. We scrutinise the choice of the <i>γ</i><sub>5</sub> scheme in single-Higgs calculations, demonstrating its non-negligible impact on SMEFT fits.</p>

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Constraining four-heavy-quark operators with top-quark, Higgs, and electroweak precision data

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月5日

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  • Stefano Di Noi,
  • Hesham El Faham,
  • Ramona Gröber,
  • Marco Vitti,
  • Eleni Vryonidou

摘要

We establish constraints on the dimension-six four-heavy-quark operators in the Standard Model Effective Field Theory (SMEFT) by synthesising LHC measurements of top-quark and single-Higgs production with electroweak precision observables. We scrutinise the choice of the γ5 scheme in single-Higgs calculations, demonstrating its non-negligible impact on SMEFT fits.