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<p>We compute the contributions of CP-conserving dimension-six SMEFT operators to the two-loop renormalisation constants of quark and gluon fields in the on-shell scheme. Specifically, we consider the top-quark chromomagnetic operator and the triple gluon operator. We also compute the contribution of four-quark operators to the gluon renormalisation constant and discuss the implications for the running of the strong coupling constant.</p>

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Two-loop renormalisation of quark and gluon fields in the SMEFT in the on-shell scheme

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月10日

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  • Claude Duhr,
  • Giuseppe Ventura,
  • Eleni Vryonidou

摘要

We compute the contributions of CP-conserving dimension-six SMEFT operators to the two-loop renormalisation constants of quark and gluon fields in the on-shell scheme. Specifically, we consider the top-quark chromomagnetic operator and the triple gluon operator. We also compute the contribution of four-quark operators to the gluon renormalisation constant and discuss the implications for the running of the strong coupling constant.