Please use this identifier to cite or link to this item:
https://elib.bsu.by/handle/123456789/259029
Title: | Measurement of double-differential cross sections for top quark pair production in pp collisions at √s=8TeV and impact on parton distribution functions |
Authors: | Dvornikov, O. Makarenko, V. Mossolov, V. Gonzalez, Suarez J. Zykunov, V. Shumeiko, N. CMS Collaboration |
Keywords: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
Issue Date: | 2017 |
Publisher: | Springer |
Abstract: | Normalized double-differential cross sections for top quark pair (t t ¯) production are measured in pp collisions at a centre-of-mass energy of 8TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 19.7fb-1. The measurement is performed in the dilepton e ±μ∓ final state. The t t ¯ cross section is determined as a function of various pairs of observables characterizing the kinematics of the top quark and t t ¯ system. The data are compared to calculations using perturbative quantum chromodynamics at next-to-leading and approximate next-to-next-to-leading orders. They are also compared to predictions of Monte Carlo event generators that complement fixed-order computations with parton showers, hadronization, and multiple-parton interactions. Overall agreement is observed with the predictions, which is improved when the latest global sets of proton parton distribution functions are used. The inclusion of the measured t t ¯ cross sections in a fit of parametrized parton distribution functions is shown to have significant impact on the gluon distribution. |
URI: | https://elib.bsu.by/handle/123456789/259029 |
DOI: | 10.1140/epjc/s10052-017-4984-5 |
Scopus: | 85024387884 |
Sponsorship: | National Science Foundation (NSF) 1151640,1211067,1506130,1506168,1606321,1607202,1624356; Science and Technology Facilities Council (STFC) PP/E000479/1,ST/H000925/1 |
Appears in Collections: | Статьи НИУ «Институт ядерных проблем» |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Sirunyan2017_Article_MeasurementOfDouble-differenti.pdf | 2,05 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.