Journal Article/Internal Report

PUBDB-2015-01145

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The Green Function for the BFKL Pomeron and the Transition to DGLAP Evolution

Kowalski, H. (Corresponding Author)DESY* ; Lipatov, L. ; Ross, D.

2014
Springer Berlin

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Please use a persistent id in citations: doi:10.1140/epjc/s10052-014-2919-y

Report No.: arXiv:1401.6298

Abstract: We consider the (process-independent) Green function for the BFKL equation with running coupling, and explain how, within the semi-classical approximation, it is related to Green function of the Airy equation. The unique Green function is obtained from a combination of its required ultraviolet behaviour compatible with asymptotic freedom and an infrared limit phase imposed by the non-perturbative sector of QCD. We show that at sufficiently large gluon transverse momenta the corresponding gluon density matches that of the DGLAP analysis, whereas for relatively small values of the gluon transverse momentum the gluon distribution is sensitive to the Regge poles, whose positions are determined both by the non-perturbative QCD dynamics and physics at large transverse momenta.

Keyword(s): gluon: transverse momentum ; gluon: density ; coupling constant: energy dependence ; higher-order: 1 ; quantum chromodynamics ; DGLAP equation ; BFKL equation ; asymptotic freedom ; nonperturbative ; Regge poles ; ultraviolet ; infrared ; pomeron

Note: OA

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Contributing Institute(s):

1. ZEUS Kollaboration (ZEUS)

Research Program(s):

1. Experiments at HERA (ZEUS) (POF2-511) (POF2-511)

Experiment(s):

1. HERA: ZEUS

Appears in the scientific report 2014

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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