| DATE: |
2006-04-10 14:00 - |
| PLACE: |
Room 345 in the bulding |
| TITLE: |
The Color Glass Condensate: From High-Energy QCD to Statistical Physics |
| CONTACT: |
tango |
| SPEAKER: |
Edmond Iancu (CEA/Saclay) |
| LANGUAGE: |
English |
| ABSTRACT: |
The Color Glass Condensate (CGC) is a high-density form of gluonic matter which controls the hadronic interactions in the limit of high energy. This is `colored' because of the gluon color charge, it is a `glass' because the gluon dynamics is slowed down by Lorentz time dilation, and is a `condensate' since the gluons form a coherent state with large occupation numbers. Because of its high density, this matter is weakly coupled, which allows for a study of high-energy QCD from first principles. Recent studies have revealed a profound correspondence between the QCD evolution towards the CGC and a class of modern problems
in statistical physics. This correspondence has shed a new light on the `geometric scaling' property of the high-energy evolution, which provides a natural explanation for a similar regularity observed in the HERA data at small Bjorken-x. It has furthermore allowed one to deduce the asymptotic behavior of the QCD amplitudes at high energy from general arguments, based on the universality of the stochastic processes. Very recently, these results have been applied to a study of the lepton-hadron deep inelastic scattering in the high energy limit. This analysis demonstrates a subtle interplay between `geometric' scaling and a new, `diffusive', scaling with increasing energy. |
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