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| Format: | Preprint |
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2026
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| Online-Zugang: | https://arxiv.org/abs/2604.09485 |
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| _version_ | 1866911582701748224 |
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| author | Garzelli, Maria Vittoria Limatola, Giovanni Moch, Sven-Olaf Steinhauser, Matthias Zenaiev, Oleksandr |
| author_facet | Garzelli, Maria Vittoria Limatola, Giovanni Moch, Sven-Olaf Steinhauser, Matthias Zenaiev, Oleksandr |
| contents | We study theoretical uncertainties in predicting top-quark pair-production near threshold at the LHC using the non-relativistic QCD framework. We include variations in the top-quark mass and width, the strong coupling $α_s$, renormalization and factorization scales, and parton distribution functions, as well as uncertainties from the color-singlet and octet Green's functions that describe quasi-bound toponium formation. These uncertainties are compared with those from standard fixed-order QCD predictions, and implications for ATLAS and CMS analyses are discussed. For the LHC at 13 TeV center-of-mass energy, the integral of the top-quark pair invariant-mass distribution from 340 to 350 GeV is 11.67 pb with ${}^{+1.43}_{-1.47}$ pb uncertainty. The corresponding excess after subtracting the POWHEG-BOX result is 4.15 pb with the same uncertainties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_09485 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Threshold Top-Quark Pair-Production: Cross Sections and Key Uncertainties Garzelli, Maria Vittoria Limatola, Giovanni Moch, Sven-Olaf Steinhauser, Matthias Zenaiev, Oleksandr High Energy Physics - Phenomenology We study theoretical uncertainties in predicting top-quark pair-production near threshold at the LHC using the non-relativistic QCD framework. We include variations in the top-quark mass and width, the strong coupling $α_s$, renormalization and factorization scales, and parton distribution functions, as well as uncertainties from the color-singlet and octet Green's functions that describe quasi-bound toponium formation. These uncertainties are compared with those from standard fixed-order QCD predictions, and implications for ATLAS and CMS analyses are discussed. For the LHC at 13 TeV center-of-mass energy, the integral of the top-quark pair invariant-mass distribution from 340 to 350 GeV is 11.67 pb with ${}^{+1.43}_{-1.47}$ pb uncertainty. The corresponding excess after subtracting the POWHEG-BOX result is 4.15 pb with the same uncertainties. |
| title | Threshold Top-Quark Pair-Production: Cross Sections and Key Uncertainties |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.09485 |