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Abstract: The next-to-leading order NLO evolution of the parton distributionfunctions PDFs in QCD is a common tool in the lepton-hadron and hadron-hadroncollider data analysis. The standard NLO DGLAP evolution is formulated forinclusive integrated PDFs and done using inclusive NLO kernels. We reporthere on the ongoing project, called KRKMC, in which NLO DGLAP evolution isperformed for the exclusive multiparton fully unintegrated distributionsePDFs with the help of the exclusive kernels. These kernels are calculatedwithin the two-parton phase space for the non-singlet evolution, usingCurci-Furmanski-Petronzio factorization scheme. The multiparton distribution,with multiple use of the exclusive NLO kernels, is implemented in the MonteCarlo program simulating multi-gluon emission from single quark emitter. Highstatistics tests $\sim 10^{10}$ events show that the new scheme worksperfectly well in practice and, at the inclusive integrated level, isequivalent with the traditional inclusive NLO DGLAP evolution. Once completed,this new technique is aimed as a building block for the new more precise NLOparton shower Monte Carlo, for W-Z production at LHC and for ep scattering, aswell as a starting point for other perturbative QCD based Monte Carlo projects.



Autor: S. Jadach, M. Skrzypek, A. Kusina, M. Slawinska

Fuente: https://arxiv.org/



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