Measurement of Energy Correlators inside Jets and Determination of the Strong Coupling α_s(m_Z)
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. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000691662Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Physical Review LettersBand
Seiten / Artikelnummer
Verlag
American Physical SocietyThema
Quark & gluon jets; Strong interaction; Hadron colliders