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<p>We present the computation of the soft-parton contribution at low transverse momentum for the production of a heavy quark pair in association with a colour singlet at the next-to-next-to-leading order (NNLO) in the QCD coupling. This paper extends to arbitrary kinematics previous results obtained under the assumption of a back-to-back configuration for the final-state emitters. These new results take into account the production of an additional colour singlet system, thus allowing for the evaluation of the resummation formula for associated heavy-quark pair production at NNLO, and the implementation of the <i>q</i><sub><i>T</i></sub> subtraction formalism for this class of processes. We provide the results in the form of a code for their on-the-fly evaluation.</p>

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Soft contributions to heavy quark production in arbitrary kinematics

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月26日

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  • Simone Devoto,
  • Javier Mazzitelli

摘要

We present the computation of the soft-parton contribution at low transverse momentum for the production of a heavy quark pair in association with a colour singlet at the next-to-next-to-leading order (NNLO) in the QCD coupling. This paper extends to arbitrary kinematics previous results obtained under the assumption of a back-to-back configuration for the final-state emitters. These new results take into account the production of an additional colour singlet system, thus allowing for the evaluation of the resummation formula for associated heavy-quark pair production at NNLO, and the implementation of the qT subtraction formalism for this class of processes. We provide the results in the form of a code for their on-the-fly evaluation.