Charmonia production from b-hadron decays at LHC with k_T-factorization: J/ψ, ψ (2S) and J/ψ + Zстатья
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Дата последнего поиска статьи во внешних источниках: 6 февраля 2018 г.
Аннотация:We consider the production of and mesons originating from the decays of b-flavored hadrons at the LHC using the kt-factorization approach. Our analysis covers both inclusive charmonia production and production of J/psi mesons in association with Z bosons. We apply the transverse momentum dependent (or unintegrated) gluon density in a proton derived from Catani–Ciafaloni–Fiorani–Marchesini (CCFM) evolution equation and adopt fragmentation functions based on the non-relativistic QCD factorization to describe the inclusive b-hadron decays into the different charmonium states. Our predictions agree well with latest experimental data taken by the CMS, ATLAS and LHCb Collaborations at \sqrt(s)=7, 8 and 13 TeV. The contributions from double parton scattering to the associated non-prompt J/psi production are estimated and found to be small.