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Large-nf Contributions to the Four-Loop Splitting Functions in QCD
J. Davies, A. Vogt, B. Ruijl +2
We have computed the fourth-order nf^2 contributions to all three non-singlet quark-quark splitting functions and their four nf^3 flavour-singlet counterparts for the evolution of…
FORM, Diagrams and Topologies
Franz Herzog, Ben Ruijl, Takahiro Ueda +2
We discuss a number of FORM features that are essential in the automatic processing of very large numbers of diagrams as used in the Forcer program for 4-loop massless propagator d…
First Forcer results on deep-inelastic scattering and related quantities
B. Ruijl, T. Ueda, J. A. M. Vermaseren +2
We present results on the fourth-order splitting functions and coefficient functions obtained using Forcer, a four-loop generalization of the Mincer program for the parametric redu…
A Critical Appraisal and Evaluation of Modern PDFs
A. Accardi, S. Alekhin, J. Blümlein +10
We review the present status of the determination of parton distribution functions (PDFs) in the light of the precision requirements for the LHC in Run 2 and other future hadron co…