On the dependence of QCD splitting functions on the choice of the evolution variable

S. Jadach 1 A. Kusina 2 W. Placzek M. Skrzypek 1
1 Institute of Nuclear Physics
2 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
Abstract : We show that already at the NLO level the DGLAP evolution kernel Pqq starts to depend on the choice of the evolution variable. We give an explicit example of such a variable, namely the maximum of transverse momenta of emitted partons and we identify a class of evolution variables that leave the NLO Pqq kernel unchanged with respect to the known standard MS-bar results. The kernels are calculated using a modified Curci-Furmanski-Petronzio method which is based on a direct Feynman-graphs calculation.
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Journal articles
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Submitted on : Tuesday, June 21, 2016 - 8:14:05 AM
Last modification on : Tuesday, May 22, 2018 - 9:48:11 PM

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S. Jadach, A. Kusina, W. Placzek, M. Skrzypek. On the dependence of QCD splitting functions on the choice of the evolution variable. Journal of High Energy Physics, Springer Verlag (Germany), 2016, 2016 (8), pp.092. ⟨10.1007/JHEP08(2016)092⟩. ⟨in2p3-01334581⟩

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