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Scientific article
Open access
English

Determination of the strong coupling constant from transverse energy$-$energy correlations in multijet events at $\sqrt{s} = 13$ TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 07, no. 7
Publication date2023
First online date2023-07-11
Abstract

Measurements of transverse energy-energy correlations and their associated azimuthal asymmetries in multijet events are presented. The analysis is performed using a data sample corresponding to 139 fb$^{−1}$ of proton-proton collisions at a centre-of-mass energy of $ \sqrt{s} $ = 13 TeV, collected with the ATLAS detector at the Large Hadron Collider. The measurements are presented in bins of the scalar sum of the transverse momenta of the two leading jets and unfolded to particle level. They are then compared to next-to-next-to-leading-order perturbative QCD calculations for the first time, which feature a significant reduction in the theoretical uncertainties estimated using variations of the renormalisation and factorisation scales. The agreement between data and theory is good, thus providing a precision test of QCD at large momentum transfers Q. The strong coupling constant α$_{s}$ is extracted as a function of Q, showing a good agreement with the renormalisation group equation and with previous analyses. A simultaneous fit to all transverse energy-energy correlation distributions across different kinematic regions yields a value of $ {\alpha}_{\textrm{s}}\left({m}_Z\right)=0.1175\pm 0.0006{\left(\exp .\right)}_{-0.0017}^{+0.0034}\left(\textrm{theo}.\right) $, while the global fit to the asymmetry distributions yields $ {\alpha}_{\textrm{s}}\left({m}_Z\right)=0.1185\pm 0.0009{\left(\exp .\right)}_{-0.0012}^{+0.0025}\left(\textrm{theo}.\right) $.[graphic not available: see fulltext]

eng
Keywords
  • Hadron-Hadron Scattering
  • Jet Physics
  • Jets
  • P p: scattering
  • P p: colliding beams
  • Energy: correlation
  • Strong interaction: coupling constant
  • Jet: multiple production
  • Quantum chromodynamics: perturbation theory
  • Scale: factorization
  • Angular distribution: asymmetry
  • Perturbation theory: higher-order
  • Higher-order: 2
  • Transverse energy
  • ATLAS
  • Strong coupling
  • Renormalization
  • Transverse momentum dependence
  • CERN LHC Coll
  • Kinematics
  • Precision measurement
  • Momentum transfer
  • Renormalization group
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Determination of the strong coupling constant from transverse energy$-$energy correlations in multijet events at $\sqrt{s} = 13$ TeV with the ATLAS detector. In: The journal of high energy physics, 2023, vol. 07, n° 7. doi: 10.1007/jhep07(2023)085
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Article (Published version)
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ISSN of the journal1029-8479
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