A Gaussian effective theory for gluon saturation
Dec, 200241 pages
Published in:
- Nucl.Phys.A 724 (2003) 181-222
e-Print:
- hep-ph/0212123 [hep-ph]
Report number:
- SACLAY-T02-181
Citations per year
Abstract:
We construct a Gaussian approximation to the effective theory for the Colour Glass Condensate which describes correctly the gluon distribution both in the low density regime at high transverse momenta (above the saturation scale ), and in the high density regime below , and provides a simple interpolation between these two regimes. At high momenta, the effective theory reproduces the BFKL dynamics, while at low momenta, it exhibits gluon saturation and, related to it, colour neutrality over the short distance scale . Gauge--invariant quantities computed within this approximation are automatically infrared finite.Note:
- 41 pages, 7 figure Report-no: SACLAY-T02/181
- quantum chromodynamics: perturbation theory
- color glass condensate
- color: condensation
- gluon: momentum spectrum
- gluon: saturation
- renormalization group: small-x
- Lipatov equation
- hadron: scattering amplitude
- color: dipole
- numerical calculations
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