Determination of the Strong Coupling Constant αₛ from Transverse Energy-Energy Correlations in Multijet Events at √S=8 TeV Using the ATLAS Detector

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Determination of the Strong Coupling Constant αₛ from Transverse Energy-Energy Correlations in Multijet Events at √S=8 TeV Using the ATLAS Detector

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Title: Determination of the Strong Coupling Constant αₛ from Transverse Energy-Energy Correlations in Multijet Events at √S=8 TeV Using the ATLAS Detector
Author(s):
Izen, Joseph M.;
Meirose, Bernhard;
Reeves, Kendall;
Aaboud, M.;
Aad, G.;
Abbott, B.;
Abdallah, J.;
Abdinov, O.;
Abeloos, B.;
Abidi, S. H.;
ATLAS Collaboration
Date Created: 2017-12-15
Item Type: article
Keywords: Show Keywords
Abstract: Measurements of transverse energy-energy correlations and their associated asymmetries in multi-jet events using the ATLAS detector at the LHC are presented. The data used correspond to √s = 8 TeV proton-proton collisions with an integrated luminosity of 20.2 fb⁻¹. The results are presented in bins of the scalar sum of the transverse momenta of the two leading jets, unfolded to the particle level and compared to the predictions from Monte Carlo simulations. A comparison with next-to-leading-order perturbative QCD is also performed, showing excellent agreement within the uncertainties. From this comparison, the value of the strong coupling constant is extracted for different energy regimes, thus testing the running of αₛ(μ) predicted in QCD up to scales over 1 TeV. A global fit to the transverse energy-energy correlation distributions yields αₛ(m_Z) = 0.1162 ± 0.0011 (exp.)_{-0.0070}^{+0.0084} (theo.), while a global fit to the asymmetry distributions yields a value of αₛ(m_Z) = 0.1196 ± 0.0013 (exp.)_{-0.0045}^{+0.0075} (theo.).
Publisher: Springer
ISSN: 1434-6044
Source: European Physical Journal C
Link to Related Resource: http://dx.doi.org/10.1140/epjc/s10052-017-5442-0
Persistent Link: http://hdl.handle.net/10735.1/6096
Bibliographic Citation: Aaboud, M., G. Aad, B. Abbott, J. Abdallah, et al. 2017. "Determination of the strong coupling constant αₛ from transverse energy-energy correlations in multijet events at √s=8 TeV using the ATLAS detector." European Physical Journal C 77(12), doi:10.1140/epjc/s10052-017-5442-0
Terms of Use: CC BY 4.0 (Attribution)
©2017 CERN, for the ATLAS Collaboration

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CC BY 4.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 4.0 (Attribution)