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<p>This is the first in a series of two papers, in which we compute the third-order QCD corrections to top-antitop production near threshold in <i>e</i><sup>+</sup><i>e</i><sup>−</sup> collisions. The present paper provides a detailed outline of the strategy of computation in the framework of non-relativistic effective theory and the threshold expansion, applicable more generally to heavy-quark pair production near threshold. It summarizes matching coefficients and potentials relevant to the next-to-next-to-next-to-leading order and ends with the master formula for the computation of the third-order Green function. The master formula is evaluated in part II of the series.</p>

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Third-order correction to top-quark pair production near threshold. Part I. Effective theory set-up and matching coefficients

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  • 发表日期：

    2025年7月29日

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  • M. Beneke,
  • Y. Kiyo,
  • K. Schuller

摘要

This is the first in a series of two papers, in which we compute the third-order QCD corrections to top-antitop production near threshold in e+e− collisions. The present paper provides a detailed outline of the strategy of computation in the framework of non-relativistic effective theory and the threshold expansion, applicable more generally to heavy-quark pair production near threshold. It summarizes matching coefficients and potentials relevant to the next-to-next-to-next-to-leading order and ends with the master formula for the computation of the third-order Green function. The master formula is evaluated in part II of the series.