Data di Pubblicazione:
2006
Citazione:
Perturbatively stable resummed small x evolution kernels / Guido Altarelli, Richard D. Ball, Stefano Forte. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - 742:1-3(2006), pp. 1-40. [10.1016/j.nuclphysb.2006.01.046]
Abstract:
We present a small x resummation for the GLAP anomalous dimension and its corresponding dual BFKL kernel, which includes all the available perturbative information and non-perturbative constraints. Specifically, it includes all the information coming from next-to-leading order GLAP anomalous dimensions and BFKL kernels, from the constraints of momentum conservation, from renormalization-group improvement of the running coupling and from gluon interchange symmetry. The ensuing evolution kernel has a uniformly stable perturbative expansion. It is very close to the unresummed NLO GLAP kernel in most of the HERA kinematic region, the small x BFKL behaviour being softened by momentum conservation and the running of the coupling. Next-to-leading corrections are small thanks to the constraint of gluon interchange symmetry. This result subsumes all previous resummations in that it combines optimally all the information contained in them.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Renormalisation ; structure functions
Elenco autori:
G. Altarelli, R.D. Ball, S. Forte
Link alla scheda completa: