Journal article
Precise determination of the strong coupling constant from dijet cross sections up to the multi-TeV range
- Abstract:
- We determine the value of the strong coupling αs and study its running over a wide range of scales as probed by the dijet production process at hadron colliders, based on an NNLO QCD analysis of LHC dijet data. From a large subset of these data a value of αs(mZ) =0.1178 ± 0.0022 is obtained for the strong coupling at the scale of the Z-boson mass mZ, using the invariant mass of the dijet system to select the scale where is probed. The combination of different data sets enhances the reach and precision of the analysis in the multi-TeV range and allows for the first determination of up to scales of 7. Complementing the LHC data with dijet cross sections measured at the HERA electron–proton collider, the kinematic range is extended to test the running of the strong coupling towards smaller scales. Our results exhibit excellent agreement with predictions based on the renormalization group equation of QCD, and represent a comprehensive test of the asymptotic behavior of QCD, spanning more than three orders of magnitude in energy scale.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 394.7KB, Terms of use)
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- Publisher copy:
- 10.1103/knrv-2r3t
Authors
+ Science and Technology Facilities Council
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- Funder identifier:
- https://ror.org/057g20z61
- Grant:
- ST/W000628/1
- 2880996
- 2275170
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 135
- Article number:
- 031903
- Publication date:
- 2025-07-17
- Acceptance date:
- 2025-05-22
- DOI:
- EISSN:
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1079-7114
- ISSN:
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0031-9007
- Language:
-
English
- Pubs id:
-
2128499
- Local pid:
-
pubs:2128499
- Deposit date:
-
2025-06-06
Terms of use
- Copyright holder:
- Ahmadova et al.
- Copyright date:
- 2025
- Rights statement:
- Copyright © 2025 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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