Apr 16 – 20, 2018
Kobe University Convention Centre / Kobe International Conference Center
Asia/Tokyo timezone

TMD splitting functions in kT factorization

Apr 18, 2018, 10:12 AM


WG2: Small-x and Diffraction WG2: Small-x and Diffraction


Aleksander Kusina (Institute of Nuclear Physics PAN)


We calculate the transverse momentum dependent gluon-to-gluon splitting function within kT-factorization, generalizing the framework employed in the calculation of the quark splitting functions in [1205.1759, 1511.08439, 1607.01507] and demonstrate at the same time the consistency of the extended formalism with previous results. While existing versions of kT factorized evolution equations contain already a gluon-to-gluon splitting function i.e. the leading order BFKL kernel or the CCFM kernel, the obtained splitting function has the important property that it reduces both to the leading order BFKL kernel in the high energy limit, to the DGLAP gluon-to-gluon splitting function in the collinear limit as well as to the CCFM kernel in the soft limit. At the same time we demonstrate that this splitting kernel can be obtained from a direct calculation of the QCD Feynman diagrams, based on a combined implementation of the Curci-Furmanski-Petronzio formalism for the calculation of the collinear splitting functions and the framework of high energy factorization.

Primary authors

Aleksander Kusina (Institute of Nuclear Physics PAN) Krzysztof Kutak (Instytut Fizyki Jadrowej Polskiej Akademii Nauk) Mirko Serino Martin Hentschinski (Universidad de las Americas, Puebla)

Presentation materials