Projects per year
Abstract
A combination of measurements of the inclusive top-quark pair production cross-section performed by ATLAS and CMS in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV at the LHC is presented. The cross-sections are obtained using top-quark pair decays with an opposite-charge electron-muon pair in the final state and with data corresponding to an integrated luminosity of about 5 fb$^{-1}$ at $\sqrt{s}=7$ TeV and about 20 fb$^{-1}$ at $\sqrt{s}=8$ TeV for each experiment. The combined cross-sections are determined to be $178.5 \pm 4.7$ pb at $\sqrt{s}=7$ TeV and $243.3^{+6.0}_{-5.9}$ pb at $\sqrt{s}=8$ TeV with a correlation of 0.41, using a reference top-quark mass value of 172.5 GeV. The ratio of the combined cross-sections is determined to be $R_{8/7}= 1.363\pm 0.032$. The combined measured cross-sections and their ratio agree well with theory calculations using several parton distribution function (PDF) sets. The values of the top-quark pole mass (with the strong coupling fixed at 0.118) and the strong coupling (with the top-quark pole mass fixed at 172.5 GeV) are extracted from the combined results by fitting a next-to-next-to-leading-order plus next-to-next-to-leading-log QCD prediction to the measurements. Using a version of the NNPDF3.1 PDF set containing no top-quark measurements, the results obtained are $m_t^\text{pole} = 173.4^{+1.8}_{-2.0}$ GeV and $\alpha_\text{s}(m_Z)= 0.1170^{+ 0.0021}_{-0.0018}$.
Original language | English |
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Article number | 213 |
Number of pages | 64 |
Journal | JHEP |
Volume | 2023 |
Issue number | 7 |
DOIs | |
Publication status | Published - 27 Jul 2023 |
Bibliographical note
59 pages in total, author lists starting at page 24, 4 figures, 6 tables. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2018-39 and at https://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-18-014/index.htmlKeywords
- hep-ex
Fingerprint
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EU674: iSAS: Innovate for Sustainable Accelerating Systems
D'Hondt, J., Tytgat, M. & D'Hondt, J.
1/03/24 → 29/02/28
Project: Fundamental
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iBOF/23/074: Unlocking the charm-Higgs coupling at the LHC
Lowette, S., D'Hondt, J., D'Hondt, J., Lowette, S., Van Mechelen, P. & Dobur, D.
1/01/23 → 31/12/26
Project: Fundamental
Datasets
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Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at $\sqrt{s}= 7$ and 8 TeV
Blekman, F. (Creator), Bols, E. S. (Creator), D'Hondt, J. (Creator), Delcourt, M. (Creator), El Faham, H. (Creator), Lowette, S. (Creator), Moortgat, S. (Creator), Morton, A. (Creator), Müller, D. (Creator), Sahasransu, A. R. (Creator), Tavernier, S. (Creator), Van Doninck, W. (Creator) & Van Mulders, P. (Creator), HEPData, 8 Feb 2024
DOI: 10.17182/hepdata.110250, https://www.hepdata.net/record/ins2088291
Dataset