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On the Singular Behaviour of Structure Functions at Low X

High Energy Physics - Phenomenology 2010-03-25 v1
Authors: H. Navelet , R. Peschanski , S. Wallon
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Abstract

We discuss the phenomenological extraction of the leading j j-plane singularity from singlet structure functions Fs F_s measured at small x. x. Using a saddle-point method we show that dlnFs/dln1x {\rm d ln} F_s /{\rm d ln}{1 \over x} is a suitable observable for this purpose in the region x≤10−2.x \le 10^{-2}. As an application, we confront and distinguish in a model-independent way structure function parametrizations coming from two different QCD evolution equations, namely the Lipatov (or BFKL) equation and the Gribov-Lipatov -Altarelli-Parisi (or GLAP) equation. Recent results at HERA are discussed in this framework.

Keywords

structure functions small x BFKL GLAP saddle-point method HERA

Cite

@article{arxiv.hep-ph/9402352,
  title  = {On the Singular Behaviour of Structure Functions at Low X},
  author = {H. Navelet and R. Peschanski and S. Wallon},
  journal= {arXiv preprint arXiv:hep-ph/9402352},
  year   = {2010}
}

Comments

14 pages with 3 figures, all in a compressed uuencoded postscript file, see instructions at the beginning of the file. If you cannot print postscript files, ask for a paper copy. SACLAY preprint T94/012

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