12,270 research outputs found
Odderon with a running coupling constant
The running coupling is introduced into the equation for the odderon via the
bootstrap relation. It is shown that the previously found odderon state with a
maximal intercept, which is constructed from antisymmetric pomeron wave
function, continues to exist in the running coupling case. Its intercept is
found to remain equal to unity independent of the behaviour assumed for the
running coupling at low momenta.Comment: 9 pages, LaTe
A New Odderon Solution in Perturbative QCD
We present and discuss a new bound state solution of the three gluon system
in perturbative QCD. It carries the quantum numbers of the odderon, has
intercept at one and couples to the impact factor .Comment: 11 pages, latex, 1 figur
BKP states in the inclusive gluon production
Inclusive cross-section for gluon production is calculated by the dispersion
technique in the NLO in the perturbative QCD with a large number of colours.
The found cross-section coincides with the one derived in the dipole picture.
No trace of the BKP states is found.Comment: 30 pages, 17 figures. Appendix with a new observation added.
Conclusions changed
Polarised deep inelastic scattering accompanied by a forward jet as a probe of the resummation
We argue that the production of forward jets in polarised deep inelastic
scattering can be a useful tool for probing the double resummation
effects which control the polarised deep inelastic scattering for small values
of the Bjorken parameter . We solve the corresponding integral equations
generating the double resummation and calculate the differential
structure function describing the forward jet production in the small
regime which can possibly be probed by the polarised HERA measurements. We show
that these structure functions should exhibit the characteristic increase with
decreasing , where denotes the longitudinal momentum fraction of
the parent proton carried by a jet, and we quantify this increase.Comment: 13 pages, latex, 5 figure
Pomeron Vertices in Perturbative QCD in Diffractive Scattering
We analyse the momentum space triple Pomeron vertex in perturbative QCD. In
addition to the standard form of this vertex which is used in the context of
total cross-sections at high energies and in the QCD reggeon field theory,
there exists an alternative form which has to be used in the study of high-mass
diffraction. We review and analyse the relation between these two versions. We
discuss some implications for the BK-equation. In the second part of our paper
we extend this analysis to the Pomeron-Odderon-Odderon vertex.Comment: 23 pages, 5 figures, Late
A momentum Space Analysis of the Triple Pomeron Vertex in pQCD
We study properties of the momentum space Triple Pomeron Vertex in
perturbative QCD. Particular attention is given to the collinear limit where
transverse momenta on one side of the vertex are much larger than on the other
side. We also comment on the kernels in nonlinear evolution equations.Comment: Minor misprints corrected. To be published in EPJ
QCD predictions for polarised deep inelastic scattering accompanied by a forward jet in the low x region of possible HERA measurements
We estimate the cross-section and asymmetry relevant for the production of
forward jets in polarised deep inelastic scattering in the region of small
values of which can be probed at possible polarised HERA measurements. The
kinematical cuts implemented in our analysis are the same as those which were
used in the unpolarised deep inelastic scattering at HERA. The calculations are
based on the double ln^2(1/x) resummation which controls the polarised deep
inelastic scattering for small values of the Bjorken parameter x. We show that
this resummation substantially enhances the corresponding cross-section and
asymmetry. The predicted value of the asymmetry is found to vary between -0.01
and -0.04 within the small x region which can possibly be probed at polarised
HERA measurements.Comment: 9 pages, latex, 3 figure
AGK Cutting Rules and Multiple Scattering in Hadronic Collisions
We discuss the AGK rules for the exchange of an arbitrary number of reggeized
gluons in perturbative QCD in the high energy limit. Results include the
cancellation of corrections to single jet and double jet inclusive cross
sections, both for hard and soft rescattering contributions.Comment: 31 pages, latex, 20 figure
Diffraction at HERA and the Confinement Problem
We discuss HERA data on the high energy behavior of the total gamma*p cross
section and on diffraction in deep inelastic scattering. We outline their
novelty in comparison with diffraction in high energy hadron hadron scattering.
As a physical picture, we propose an interpretation in terms of QCD radiation
at small and large distances: a careful study of the transition between the two
extremes represents a new approach to the QCD confinement problem.Comment: 30 pages. Some references adde
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