Evidence for the discrete asymptotically-free BFKL Pomeron from HERA data

2008/03/03 by J. Ellis, John Ellis, H. Kowalski +2 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/j.physletb.2008.08.007

published as Phys.Lett.B668:51-56,2008 · 12 pages, 4 figures

arxiv created 2008/03/03 · openalex publication_date 2008/08/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

We show that the next-to-leading-order renormalization-group-improved asymptotically-free BFKL Pomeron provides a good fit to HERA data on virtual photoproduction at small x and large Q 2 . The leading discrete Pomeron pole reproduces qualitatively the Q 2 dependence of the HERA data for x ∼ 10 −3 , and a fit using the three leading discrete singularities reproduces quantitatively the Q 2 and x dependence of the HERA data for x < 10 −2 . This fit fixes the phase for all the BFKL wavefunctions at a chosen infrared scale.

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