Abstract
A measurement of transverse energy–energy correlations and its asymmetry in [Formula: see text] collisions recorded by the ATLAS detector at the LHC at [Formula: see text] TeV is presented. The results are used to determine the strong coupling constant [Formula: see text]. A global fit to the transverse energy–energy correlation distributions yields [Formula: see text], while a global fit to the corresponding asymmetry distributions yields a value of [Formula: see text].
Highlights
Energy–energy correlations were proposed as a precision test of Quantum Chromodynamics (QCD) in e+e− annihilation [1]
It is customary to define the asymmetry on the transverse energy–energy correlation function (TEEC) function (ATEEC) as
Monte Carlo modelling: The correction for detector effects is performed using two different models, Pythia and Herwig++, and the difference between them is ascribed as the modelling uncertainty
Summary
Energy–energy correlations were proposed as a precision test of Quantum Chromodynamics (QCD) in e+e− annihilation [1]. This observable, which exploits the phenomenon of azimuthal decorrelations, was further adapted to hadron-hadron collisions [2], and its next-to-leading order (NLO) corrections were calculated [3]. The dependence of the TEEC and ATEEC on the strong coupling constant, αs, and their mild dependence with other experimental and theoretical parameters make. This is an Open Access article published by World Scientific Publishing Company. The ATLAS Collaboration at the LHC [4] has recently presented a measurement of the TEEC and ATEEC functions [5]
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