360 research outputs found
Scaling phenomena from non-linear evolution in high energy DIS
The numerical solutions of the non-linear evolution equation are shown to
display the ``geometric'' scaling recently discovered in the experimental data.
The phenomena hold both for proton and nucleus targets for all below
and . The
scaling is practically exact (few percent error) in the saturation region. In
addition, an approximate scaling is found in the validity domain of the linear
evolution where it holds with about 10% accuracy.
Basing on the scaling phenomena we determine the saturation scale
and study both its -dependence and the atomic number dependence for the
nuclei.Comment: 13 pages, 20 figure
Remarks on Diffractive Dissociation within JIMWLK Evolution at NLO
We discuss the high energy diffractive dissociation in DIS at the Next to
Leading Order. In the large dipole limit we derive the NLO version of the
Kovchegov-Levin equation. We argue that the original structure of the equation
is preserved, that is it coincides with the Balitsky-Kovchegov equation at NLO.Comment: 5 pages, a ref added. To appear in PL
Diffractive dissociation and saturation scale from non-linear evolution in high energy DIS
This paper presents the first numerical solution to the non-linear evolution
equation for diffractive dissociation processes in deep inelastic scattering.
It is shown that the solution depends on one scaling variable , where is the saturation scale for the diffraction
processes. The dependence of the saturation scale on both
and is investigated, ( is a minimal rapidity gap for
the diffraction process). The - dependence of turns out to be the
same as of the saturation scale in the total inclusive DIS cross section. In
our calculations reveals only mild dependence on . The
scaling is shown to hold for but is violated at .Comment: 13 pages, 9 figure
High Energy QCD at NLO: from light-cone wave function to JIMWLK evolution
Soft components of the light cone wave-function of a fast moving projectile
hadron is computed in perturbation theory to third order in QCD coupling
constant. At this order, the Fock space of the soft modes consists of
one-gluon, two-gluon, and a quark-antiquark states. The hard component of the
wave-function acts as a non-Abelian background field for the soft modes and is
represented by a valence charge distribution that accounts for non-linear
density effects in the projectile. When scattered off a dense target, the
diagonal element of the S-matrix reveals the Hamiltonian of high energy
evolution, the JIMWLK Hamiltonian. This way we provide a new direct derivation
of the JIMWLK Hamiltonian at the Next-to-Leading Order.Comment: 83 pages, 15 figures; explanatory comments added, published versio
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