101. Heavy-quark pair production at lepton colliders at NNNLO in QCD
- Author
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Chen, Xiang, Guan, Xin, He, Chuan-Qi, Liu, Xiao, and Ma, Yan-Qing
- Subjects
High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
We compute the total cross-section and invariant mass distribution for heavy-quark pair production in $e^+e^-$ annihilation at the next-to-next-to-next-to-leading order in QCD. The obtained results are expressed as piecewise functions defined by several deeply expanded power series, facilitating a rapid numerical evaluation. Utilizing top-pair production at a collision energy of 500 GeV as a benchmark, we observe a correction of approximately $0.1\%$ for the total cross-section and around $10\%$ for the majority of the invariant mass distribution range. These results play a crucial role in significantly reducing theoretical uncertainty: the scale dependence has been diminished to $0.06\%$ for the total cross-section and to $5\%$ for the invariant mass distribution. This reduction of uncertainty meets the stringent requirements of future lepton colliders., Comment: 7 pages, 5 figures; invariant mass distribution for heavy-quark pair added; version published at PRL
- Published
- 2022
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