TMD parton shower effects in associated γ+jet production 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: 10 октября 2019 г.
Аннотация:We investigate associated prompt photon and hadronic jet production at the LHC energies using the kT-factorization approach. Our consideration is based on the O(αα2s) off-shell gluon-gluon fusion subprocess g∗g∗→γq¯q and several subleading quark-initiated contributions from O(ααs) and O(αα2s) subprocesses, taken into account in the conventional (collinear) QCD factorization. The transverse momentum–dependent (or unintegrated) gluon densities in a proton are derived from Catani-Ciafaloni-Fiorani-Marchesini evolution equation. We achieve reasonably good agreement with the experimental data taken by CMS and ATLAS Collaborations and demonstrate the importance of initial-state parton showers for jet determination in the kT-factorization approach.