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Заглавие документа: | Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector |
Авторы: | Hrynevich, A. ATLAS Collaboration |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика ЭБ БГУ::ТЕХНИЧЕСКИЕ И ПРИКЛАДНЫЕ НАУКИ. ОТРАСЛИ ЭКОНОМИКИ::Ядерная техника |
Дата публикации: | 2021 |
Издатель: | Springer Science and Business Media Deutschland GmbH |
Библиографическое описание источника: | Journal of High Energy Physics 2021(101),169 |
Аннотация: | A measurement of prompt photon-pair production in proton-proton collisions at s = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb−1. Events with two photons in the well-instrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of pT,γ1(2)> 40 (30) GeV for the leading (sub-leading) photon. The differential cross sections as functions of several observables for the diphoton system are measured and compared with theoretical predictions from state-of-the-art Monte Carlo and fixed-order calculations. The QCD predictions from next-to-next-to-leading-order calculations and multi-leg merged calculations are able to describe the measured integrated and differential cross sections within uncertainties, whereas lower-order calculations show significant deviations, demonstrating that higher-order perturbative QCD corrections are crucial for this process. The resummed predictions with parton showers additionally provide an excellent description of the low transverse-momentum regime of the diphoton system. [Figure not available: see fulltext.]. |
URI документа: | https://elib.bsu.by/handle/123456789/288399 |
DOI документа: | 10.1007/JHEP11(2021)169 |
Scopus идентификатор документа: | 85120959330 |
Лицензия: | info:eu-repo/semantics/openAccess |
Располагается в коллекциях: | Статьи НИУ «Институт ядерных проблем» |
Полный текст документа:
Файл | Описание | Размер | Формат | |
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JHEP11(2021)169.pdf | 4,24 MB | Adobe PDF | Открыть |
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