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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Study of charmonia production and radiation at the LHC
 Váňa, Pavel ; Spousta, Martin (advisor) ; Pleskot, Vojtěch (referee)
This thesis contains a study of production and radiation of J/ψ and ψ(2S) in pp collisions. Basic analysis of J/ψ and ψ(2S) using data from pp collisions at √ s = 5.02TeV measured in 2017 by the ATLAS Experiment at the LHC is performed. The yield of J/ψ is separated into prompt and non-prompt components. A comparison between Monte Carlo generator Pythia 8.240 and data collected by the ATLAS Experiment in 2015 and 2017 at √ s = 5.02 TeV is done. Transverse momentum dependent discrepancy between data and simulation is observed. It is seen that the description of charmonia production by Pythia 8 is limited since it cannot reproduce the shape of measured cross-section. An introduction to yield extraction using RooFit from measured data is also provided. Another part of this thesis is the description of charmonium production and gluon radiation in pp collisions simulated by Pythia generator. The slow growth of the mean value of the number of gluons radiated by charmonium intermediate octet state with increasing pT is observed. 1
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