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<p>Recently, we have presented the result for the zero-jettiness soft function at next-to-next-to-next-to-leading order (N3LO) in perturbative QCD [1], without providing technical details of the calculation. The goal of this paper is to describe the most important element of that computation, the triple real-emission contribution. We present a detailed discussion of the many technical aspects of the calculation, for which a number of methodological innovations was required. Although some elements of the calculation were discussed earlier [2–6], this paper is intended to provide a complete summary of the methods used in the computation of the triple real-emission contribution to the soft function.</p>

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Triple real-emission contribution to the zero-jettiness soft function at N3LO in QCD

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月11日

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  • Daniel Baranowski,
  • Maximilian Delto,
  • Kirill Melnikov,
  • Andrey Pikelner,
  • Chen-Yu Wang

摘要

Recently, we have presented the result for the zero-jettiness soft function at next-to-next-to-next-to-leading order (N3LO) in perturbative QCD [1], without providing technical details of the calculation. The goal of this paper is to describe the most important element of that computation, the triple real-emission contribution. We present a detailed discussion of the many technical aspects of the calculation, for which a number of methodological innovations was required. Although some elements of the calculation were discussed earlier [2–6], this paper is intended to provide a complete summary of the methods used in the computation of the triple real-emission contribution to the soft function.