Extending the QCD Perturbative Domain to Higher Energies [article]

Marcello Ciafaloni
2003 arXiv   pre-print
After a brief introduction to low-x QCD and to resummation approaches, I illustrate the predictions for the gluon Green function and splitting function of a recent renormalization-group improved small-x resummation scheme. I argue, on this basis, that the range of validity of perturbative calculations is considerably extended in rapidity with respect to leading log expectations. The perturbative high-energy exponents are predicted in a phenomenologically interesting range, and significant
more » ... mptotic effects are found. In particular, the splitting function shows a shallow dip in the moderate-x region, followed by the expected small-x power increase.
arXiv:hep-ph/0310110v1 fatcat:dwpc3l6o3zcorcgkafmbdztwpq