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Z boson production in Pb+Pb collisions at √s_NN= 5.02 TeV measured by the ATLAS experimentстатья
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: 22 апреля 2020 г.
- Авторы: Boldyrev A.S., Denisov S.P., Gladilin L.K., Korotkova N.A., Kramarenko V.A., Maevsky A.S., Meshkov O.V., Sinetckii V.V., Sivoklokov S.Yu, Smirnova L.N., Turchikhin S.M., ATLAS Collaboration
- Журнал: Physics Letters B
- Том: 802
- Номер: 135262
- Год издания: 2020
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 1
- Последняя страница: 23
- DOI: 10.1016/j.physletb.2020.135262
- Аннотация: The production yield of Z bosons is measured in the electron and muon decay channels in Pb+Pb collisions at √s = 5.02 TeV with the ATLAS detector. Data from the 2015 LHC run corresponding to an integrated luminosity of 0.49 nb-1 are used for the analysis. The Z boson yield, normalised by the total number of minimum-bias events and the mean nuclear thickness function, is measured as a function of dilepton rapidity and event centrality. The measurements in Pb+Pb collisions are compared with similar measurements made in proton–proton collisions at the same centre-of-mass energy. The nuclear modification factor is found to be consistent with unity for all centrality intervals. The results are compared with theoretical predictions obtained at next-to-leading order using nucleon and nuclear parton distribution functions. The normalised Z boson yields in Pb+Pb collisions lie 1–3σ above the predictions. The nuclear modification factor measured as a function of rapidity agrees with unity and is consistent with a next-to-leading-order QCD calculation including the isospin effect.
- Добавил в систему: Гладилин Леонид Константинович