Measurement of energy correlators inside jets and determination of the strong coupling ${\alpha }_{\mathrm{S}}(m_{\mathrm{Z}})$

Abstract

Energy correlators that describe energy-weighted distances between two or three particles in a jet are measured using an event sample of $\sqrt{s}$ = 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: ${\alpha }_{\mathrm{S}}(m_{\mathrm{Z}})$ = 0.1229 ${}_{-0.0050}^{+0.0040}$, the most precise ${\alpha }_{\mathrm{S}}(m_{\mathrm{Z}})$ value obtained using jet substructure observables.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-22-015 (CMS Public Pages)