Journal article
Determination of the strong coupling constant αs(mZ) from measurements of the total cross section for top–antitop-quark production
- Abstract:
- We present a determination of the strong coupling constant αs(mZ) using inclusive top-quark pair production cross section measurements performed at the LHC and at the Tevatron. Following a procedure first applied by the CMS Collaboration, we extract individual values of αs(mZ) from measurements by different experiments at several centre-of-mass energies, using QCD predictions complete in NNLO perturbation theory, supplemented with NNLL approximations to all orders, and suitable sets of parton distribution functions. The determinations are then combined using a likelihood-based approach, where special emphasis is put on a consistent treatment of theoretical uncertainties and of correlations between various sources of systematic uncertainties. Our final combined result is αs(mZ)=0.1177+0.0034−0.0036
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 933.3KB, Terms of use)
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- Publisher copy:
- 10.1140/epjc/s10052-017-5340-5
Authors
+ European Research Council
More from this funder
- Funding agency for:
- Salam, G
- Grant:
- Advanced Grant Higgs@LHC: 321133
- Publisher:
- Springer
- Journal:
- European Physical Journal C More from this journal
- Volume:
- 77
- Publication date:
- 2017-11-18
- Acceptance date:
- 2017-10-27
- DOI:
- EISSN:
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1434-6052
- ISSN:
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1434-6044
- Language:
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English
- Pubs id:
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pubs:948603
- UUID:
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uuid:6d648583-8372-4674-8ab4-cafaa929ca0f
- Local pid:
-
pubs:948603
- Source identifiers:
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948603
- Deposit date:
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2018-11-30
- ARK identifier:
Terms of use
- Copyright holder:
- Klijnsma et al
- Copyright date:
- 2017
- Notes:
- © The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
- Licence:
- CC Attribution (CC BY)
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