Analytic NNLO QCD corrections to top quark pair production in electron-positron collisions
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| Format: | Preprint |
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2024
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| _version_ | 1866909308327821312 |
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| author | Chen, Long-Bin Wang, Jian Wang, Yefan |
| author_facet | Chen, Long-Bin Wang, Jian Wang, Yefan |
| contents | We present the analytic total cross section of top quark pair production in electron-positron annihilation at next-to-next-to-leading order (NNLO) in Quantum Chromodynamics (QCD). By utilizing the optical theorem, the NNLO corrections are related to the imaginary parts of three-loop self-energy Feynman diagrams, of which the master integrals are calculated with canonical differential equations. The analytic results for the NNLO corrections are expressed in terms of multiple polylogarithms as well as elliptic functions. We discuss the asymptotic expansions near the threshold and in the high energy limit in detail. Numerical results are provided for the total cross section of top quark pair production at future lepton colliders. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_18912 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Analytic NNLO QCD corrections to top quark pair production in electron-positron collisions Chen, Long-Bin Wang, Jian Wang, Yefan High Energy Physics - Phenomenology We present the analytic total cross section of top quark pair production in electron-positron annihilation at next-to-next-to-leading order (NNLO) in Quantum Chromodynamics (QCD). By utilizing the optical theorem, the NNLO corrections are related to the imaginary parts of three-loop self-energy Feynman diagrams, of which the master integrals are calculated with canonical differential equations. The analytic results for the NNLO corrections are expressed in terms of multiple polylogarithms as well as elliptic functions. We discuss the asymptotic expansions near the threshold and in the high energy limit in detail. Numerical results are provided for the total cross section of top quark pair production at future lepton colliders. |
| title | Analytic NNLO QCD corrections to top quark pair production in electron-positron collisions |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2405.18912 |