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Fluctuating pulled fronts & Pomerons

Authors
  • Iancu, Edmond
Type
Preprint
Publication Date
Mar 07, 2005
Submission Date
Mar 07, 2005
Identifiers
DOI: 10.1063/1.1961047
Source
arXiv
License
Unknown
External links

Abstract

I give a physical discussion of the influence of particle number fluctuations on the high energy evolution in QCD. I emphasize the event-by-event description and the correspondence with the problem of `fluctuating pulled fronts' in statistical physics. I show that the correlations generated by fluctuations reduce the phase-space for BFKL evolution up to saturation. Because of that, the evolution `slows down', and the rate for the energy increase of the saturation momentum is considerably decreased. Also, the stochastic aspects inherent in fluctuations lead to the breakdown of geometric scaling and of the BFKL approximation. Finally, I explain the diagrammatic interpretation of the particle number fluctuations as initiators of the Pomeron loops.

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