Measurement of energy correlators inside jets and determination of the strong coupling α_S(m_Z)

Авторы: Belyaev A.V., Boos E., Dubinin M., Dudko L., Ershov A.A., Klyukhin V., Kodolova O., Lukina O., Obraztsov S., Petrushanko S.V., Savrin V., Snigirev A., Vardanyan I., CMS Collaboration
Журнал: Physical Review Letters
Том: 133
Год издания: 2024
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 071903
DOI: 10.1103/PhysRevLett.133.071903
Аннотация: 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+0.0040−0.0050 , the most precise α_S(m_Z) value obtained using jet substructure observables.
Добавил в систему: Клюхин Вячеслав Иванович

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