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Measurement of long-range two-particle azimuthal correlations in Z-boson tagged pp collisions at √s=8 and 13 TeVстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 апреля 2020 г.
- Авторы: Boldyrev A.S., Denisov S.P., Gladilin L.K., Korotkova N.A., Kramarenko V.A., Maevsky A.S., Sivoklokov S.Yu, Smirnova L.N., Turchikhin S.M., ATLAS Collaboration
- Журнал: European Physical Journal C
- Том: 80
- Номер: 64
- Год издания: 2020
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 1
- Последняя страница: 32
- DOI: 10.1140/epjc/s10052-020-7606-6
- Аннотация: Results are presented from the measurement by ATLAS of long-range (|η| > 2) dihadron angular correlations in √s = 8 and 13 TeV pp collisions containinga Z boson. The analysis is performed using 19.4 fb−1 of√s = 8 TeV data recorded during Run 1 of the LHC and36.1 fb−1 of √s = 13 TeV data recorded during Run 2.Two-particle correlation functions are measured as a function of relative azimuthal angle over the relative pseudorapidity range 2 < |η| < 5 for different intervals ofcharged-particle multiplicity and transverse momentum. Themeasurements are corrected for the presence of backgroundcharged particles generated by collisions that occur duringone passage of two colliding proton bunches in the LHC.Contributions to the two-particle correlation functions fromhard processes are removed using a template-fitting procedure. Sinusoidal modulation in the correlation functions is observed and quantified by the second Fourier coefficient ofthe correlation function, v2,2, which in turn is used to obtainthe single-particle anisotropy coefficient v2. The v2 valuesin the Z-tagged events, integrated over 0.5 < pT < 5 GeV,are found to be independent of multiplicity and √s, and consistent within uncertainties with previous measurements in inclusive pp collisions. As a function of charged-particle pT,the Z-tagged and inclusive v2 values are consistent within uncertainties for pT < 3 GeV.
- Добавил в систему: Гладилин Леонид Константинович