Measurement of Energy Correlators inside Jets and Determination of the Strong Coupling α_s(m_Z)
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Date
2024-08-16
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Journal Article
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Abstract
Energy correlators that describe energy-weighted distances between two or three particles in a hadronic jet are measured using an event sample of √s = 13 TeV proton-proton collisions collected by the CMS experiment and corresponding to an integrated luminosity of 36.3 fb⁻¹. The measured distributions are consistent with the trends in the simulation that reveal two key features of the strong interaction: confinement and asymptotic freedom. By comparing the ratio of the measured three- and two-particle energy correlator distributions with theoretical calculations that resum collinear emissions at approximate next-to-next-to-leading-logarithmic accuracy matched to a next-to-leading-order calculation, the strong coupling is determined at the Z boson mass: α_S(m_Z) = 0.1229₋₀.₀₀₅₀⁺⁰.⁰⁰⁴⁰, the most precise α_S(m_Z) value obtained using jet substructure observables.
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published
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Journal / series
Volume
133 (7)
Pages / Article No.
71903
Publisher
American Physical Society
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Subject
Quark & gluon jets; Strong interaction; Hadron colliders
Organisational unit
09720 - de Cosa, Annapaola / de Cosa, Annapaola
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer