Discriminating the heavy jet production mechanisms in associated Z + heavy flavor events at the LHCстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 апреля 2022 г.
Аннотация:We reconsider the associated Z boson and charm or beauty jet production at the LHC by paying special attention to the formation dynamics of heavy jets. Two different approaches are studied: first one, where heavy quarks are produced in the hard scattering subprocesses, implemented in the Monte-Carlo generator PEGASUS, and another method, where the hard scattering is calculated at NLO with MADGRAPH5_AMC@NLO and TMD parton shower is included (implemented in the Monte-Carlo generator CASCADE3). We compare the predictions obtained in both schemes with latest experimental data for associated 𝑍+𝑏 production cross sections and the relative production rate 𝜎(𝑍+𝑐)/𝜎(𝑍+𝑏) collected by the ATLAS and CMS Collaborations at 𝑠√=13 TeV. We introduce two kinematic observables (denoted as 𝑧𝑏 and 𝑝rel𝑇) which can be used to discriminate between the heavy jet production mechanisms. Using these variables we trace the shape of the simulated b-jet events and recommend that these observables be taken into consideration in the forthcoming experimental analyses.