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Заглавие документа: | Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV |
Авторы: | Chekhovsky, V. Mossolov, V. Gonzalez, Suarez J. CMS Collaboration |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
Дата публикации: | 2018 |
Издатель: | Institute of Physics Publishing |
Библиографическое описание источника: | Instrum 2018;13(5). |
Аннотация: | Many measurements and searches for physics beyond the standard model at the LHC rely on the efficient identification of heavy-flavour jets, i.e. jets originating from bottom or charm quarks. In this paper, the discriminating variables and the algorithms used for heavy-flavour jet identification during the first years of operation of the CMS experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, are presented. Heavy-flavour jet identification algorithms have been improved compared to those used previously at centre-of-mass energies of 7 and 8 TeV. For jets with transverse momenta in the range expected in simulated events, these new developments result in an efficiency of 68% for the correct identification of a b jet for a probability of 1% of misidentifying a light-flavour jet. The improvement in relative efficiency at this misidentification probability is about 15%, compared to previous CMS algorithms. In addition, for the first time algorithms have been developed to identify jets containing two b hadrons in Lorentz-boosted event topologies, as well as to tag c jets. The large data sample recorded in 2016 at a centre-of-mass energy of 13 TeV has also allowed the development of new methods to measure the efficiency and misidentification probability of heavy-flavour jet identification algorithms. The b jet identification efficiency is measured with a precision of a few per cent at moderate jet transverse momenta (between 30 and 300 GeV) and about 5% at the highest jet transverse momenta (between 500 and 1000 GeV). |
URI документа: | https://elib.bsu.by/handle/123456789/259421 |
DOI документа: | 10.1088/1748-0221/13/05/P05011 |
Scopus идентификатор документа: | 85047881197 |
Финансовая поддержка: | CERN for the benefit of the CMS collaboration. |
Располагается в коллекциях: | Статьи НИУ «Институт ядерных проблем» |
Полный текст документа:
Файл | Описание | Размер | Формат | |
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Sirunyan_2018_J._Inst._13_P05011.pdf | 5,52 MB | Adobe PDF | Открыть |
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