111 research outputs found
On the low-x NLO evolution of 4 point colorless operators
The NLO evolution equations for quadrupole and double dipole operators have
been obtained within the high energy operator expansion method. The
corresponding quasi-conformal evolution equations for the composite operators
were constructed
NLO evolution of 3-quark Wilson loop operator
It is well known that high-energy scattering of a meson from some hadronic
target can be described by the interaction of that target with a color dipole
formed by two Wilson lines corresponding to fast quark-antiquark pair.
Moreover, the energy dependence of the scattering amplitude is governed by the
evolution equation of this color dipole with respect to rapidity. Similarly,
the energy dependence of scattering of a baryon can be described in terms of
evolution of a three-Wilson-lines operator with respect to the rapidity of the
Wilson lines. We calculate the evolution of the 3-quark Wilson loop operator in
the next-to-leading order (NLO) and present a quasi-conformal evolution
equation for a composite 3-Wilson-lines operator. We also obtain the linearized
version of that evolution equation describing the amplitude of the odderon
exchange at high energies
Towards a complete next-to-logarithmic description of forward exclusive diffractive dijet electroproduction at HERA: real corrections
We studied the diffractive cross section with ZEUS
phase space. Neglecting the -channel momentum in the Born and gluon dipole
impact factors, we calculated the corresponding contributions to the cross
section differential in and the angle
between the leptonic and hadronic planes. The gluon dipole contribution
was obtained in the exclusive -algorithm with the exclusive cut
in the small approximation. In the collinear
approximation we canceled singularities between real and virtual contributions
to the dipole configuration, keeping the exact dependency.
We used the Golec-Biernat - W\"usthoff (GBW) parametrization for the dipole
matrix element and linearized the double dipole contributions. The results give
roughly of the observed cross section for small and
coincides with it for large Comment: 40 pages, 7 figure
Impact factor for high-energy two and three jets diffractive production
We present the calculation of the impact factor for the gamma(*) -> q qb g
transition within Balitsky's high energy operator expansion. We also rederive
the impact factor for the gamma(*) -> q qb transition within the same
framework. These results provide the necessary building blocks for further
phenomenological studies of inclusive diffractive deep inelastic scattering as
well as for two and three jets diffractive production which go beyond
approximations discussed in the litterature.Comment: 27 pages, 2 figure
Impact Factor for Exclusive Diffractive Dijet Production with NLO Accuracy
Relying on the shockwave approach, we present the main steps of the
computation of the impact factor for the exclusive diffractive photo- or
electro- production of a forward dijet with NLO accuracy. We provide details of
the cancellation mechanisms for all the divergences which appear in the
intermediate results.Comment: 4 pages, 1 figure; proceedings of "Diffraction 2016", International
Workshop on Diffraction in High-Energy Physics, Acireale (Catania, Sicily),
Sept. 2-8, 2016; to be published in the conference proceedings by AI
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