Speaker
Markus Diehl
(DESY)
Description
We study the evolution of parton densities in the proton to very low scales. Starting with Mellin moments obtained from global PDF fits, we find that the current knowledge of PDFs exludes scenarios in which the gluon or the antiquark distributions in the proton vanish (or are very small) at some low scale, at least when perturbative evolution is used.
