Energy correlators that describe energy-weighted distances between two or three particles in a 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: αS(mZ) = 0.1229 +0.0040−0.0050, the most precise αS(mZ) value obtained using jet substructure observables.

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J. ., Bergauer, T., Chatterjee, S., et al. (2024). Measurement of energy correlators inside jets and determination of the strong coupling αS(mZ). PHYSICAL REVIEW LETTERS, 133(7), 1-20 [10.1103/physrevlett.133.071903].

Measurement of energy correlators inside jets and determination of the strong coupling αS(mZ)

Battilana, C.;Bonacorsi, D.;Borgonovi, L.;Castro, A.;Cuffiani, M.;Diotalevi, T.;Fanfani, A.;Giommi, L.;Guiducci, L.;Siroli, G.  P.;
2024

Abstract

Energy correlators that describe energy-weighted distances between two or three particles in a 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: αS(mZ) = 0.1229 +0.0040−0.0050, the most precise αS(mZ) value obtained using jet substructure observables.
2024
Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J. ., Bergauer, T., Chatterjee, S., et al. (2024). Measurement of energy correlators inside jets and determination of the strong coupling αS(mZ). PHYSICAL REVIEW LETTERS, 133(7), 1-20 [10.1103/physrevlett.133.071903].
Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J.  W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P.  S.; Jeitler, M...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1001421
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