Associated Higgs boson+jets production at the LHC and Catani-Ciafaloni-Fiorani-Marchesini gluon dynamics in a protonстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 30 июня 2021 г.
Аннотация:We consider the associated production of Higgs boson and hadronic jet(s) in $pp$ collisions at the LHC for the first time using the $k_T$-factorization approach. Our analysis is based on the off-shell gluon-gluon fusion subprocess, where non-zero transverse momenta of initial gluons are taken into account andcovers $H \to \gamma \gamma$, $H \to ZZ^* \to 4l$ (with $l = e,\mu$) and $H \to W^+ W^- \to e^\pm \mu^\mp \nu \bar \nu$ decay channels.The transverse momentum dependent (TMD, or unintegrated) gluon densities in a proton are taken from Catani-Ciafaloni-Fiorani-Marchesini (CCFM) evolution equation. To simulate the kinematics of the produced jets the TMD parton shower implemented into the Monte-Carlo event generator \textsc{cascade} is applied.The comparison of our results with the latest experimental data taken by the CMS andATLAS Collaborations at $\sqrt s = 8$ and $13$~TeV is presented. Our predictions are compared also with the results of conventional higher-order perturbative QCDcalculations. We highlight observables, which are sensitive to the TMD gluon densities in a proton.