The triple-pomeron regime and structure function of the pomeron in diffractive deep inelastic scattering at very smallx

Николаев, Н. Н.; Захаров, Б. Г.

doi:10.1007/bf01957772

Cited by 189 publications

(200 citation statements)

References 41 publications

(114 reference statements)

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“…Recall now, that for the free-nucleon target, dipole cross section and unintegrated gluon distribution are related by [14] σ(x, r)…”

Section: B Momentum Space Formulation Of Vector-meson Production On mentioning

confidence: 99%

“…Fock-states become important. On the free nucleon target, the effect of higher Fock-states, which contain gluons strongly ordered in rapidity can be resummed, and leads to the small-x evolution of the then x-dependent dipole cross section [14]. The multiple scatterings of the QQg-Fock state off a heavy nucleus are given by the first iteration of the nonlinear Balitsky-Kovchegov [15] evolution equation…”

Section: B Momentum Space Formulation Of Vector-meson Production On mentioning

confidence: 99%

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Exclusive coherent production of heavy vector mesons in nucleus-nucleus collisions at energies available at the CERN Large Hadron Collider

2012

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Heavy nuclei at collider energies are a source of high energy Weizsäcker-Williams photons.This photon flux may be utilized to study high energy photon-nucleus interactions. Here we concentrate on the coherent diffractive production of heavy vector mesons on nuclear targets and show how it probes the unintegrated glue of the nucleus in the saturation domain. We present predictions for rapidity distributions of exclusive coherent J/Ψ and Υ mesons which can be measured by the ALICE experiment at the LHC.

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“…Recall now, that for the free-nucleon target, dipole cross section and unintegrated gluon distribution are related by [14] σ(x, r)…”

Section: B Momentum Space Formulation Of Vector-meson Production On mentioning

confidence: 99%

Section: B Momentum Space Formulation Of Vector-meson Production On mentioning

confidence: 99%

Exclusive coherent production of heavy vector mesons in nucleus-nucleus collisions at energies available at the CERN Large Hadron Collider

2012

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“…The impact of specific inclusive channels on the total cross section (total photoabsorption cross section for DIS) is controlled by unitarity. The well known example is the so-called AGK rules for diffractive scattering (Pomeron exchange) [33], by which the opening of diffractive channels gives rise to the shadowing correction and reduces the proton structure function [35][36][37]. The gross features of this relationship can be understood as follows.…”

Section: From Inclusive Hadronic Cross Section To the Total Crosmentioning

confidence: 99%

Do the E866 Drell-Yan data change our picture of the chiral structure of the nucleon?

et al. 1999

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We revisit the evaluation of the pionic mechanism of theū −d-asymmetry in the proton structure function. Our analysis is based on the extended AGK unitarity relation between contributions of different mechanisms to the inclusive particle production and the total photoabsorption cross-section (i.e. the proton structure function). We reanalyze the role of isovector reggeons in inclusive production of nucleons and Delta isobars in hadronic reactions. We find rather large contribution of reggeonexchange induced production of Delta isobars. This leaves much less room for the pion-exchange induced mechanism of ∆ production and provides a constraint on the πN ∆ form factor. The production of leading pions in proton-proton collisions at ISR puts additional constraints on the πN N vertex form factors. An extension of the AGK-rules to reggeon exchange suggests a negligible contribution to the proton structure function from DIS off the exchanged ρ, a2 reggeons. All these constraints are used then to estimate the pion content of the nucleon and allow to calculate parameter-free the x-dependence ofd −ū. We discuss the violation of the Gottfried Sum Rule andd-ū asymmetry and compare to the one obtained from the E866 experiment at Fermilab. We estimate the background to the pion structure function being determined by the ZEUS and H1 collaborations at HERA from leading neutron experiments.

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“…A further essential step is the inclusion of higher Fock states in the photon wave function. In the framework of two gluon exchange, corresponding calculations for the qqg state were performed in [52]. The main shortcoming of the twogluon approach is the problem of justifying perturbation theory.…”

Section: The Aligned Jet Model and Its Modern Versionsmentioning

confidence: 99%

Non-perturbative high-energy QCD

Hebecker¹

2001

Proceedings of International Europhysics Conference on High Energy Physics — PoS(hep2001)

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It is the aim of this talk to review our understanding of the high-energy limit of QCD, focussing, in particular, on recent theoretical developments. After a brief introduction, I will recall why the true high-energy limit of QCD scattering processes is genuinly non-perturbative and why it has so far not been possible to apply lattice methods to this type of physics. Given the experimental fact of slowly rising hadronic cross sections, we are thus faced with a fundamental problem comparable to that of confinement but without the promise of the lattice. During the last years, the experimental side of this field has largely been driven by the HERA accelerator, which has, naturally, also influenced recent theoretical work in high-energy QCD. I will therefore devote the second part of the talk to small-x deep inelastic scattering, in particular the physics of diffraction, and attempt to describe its impact on the wider field of non-perturbative high-energy QCD.

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The triple-pomeron regime and structure function of the pomeron in diffractive deep inelastic scattering at very smallx

Cited by 189 publications

References 41 publications

Exclusive coherent production of heavy vector mesons in nucleus-nucleus collisions at energies available at the CERN Large Hadron Collider

Exclusive coherent production of heavy vector mesons in nucleus-nucleus collisions at energies available at the CERN Large Hadron Collider

Do the E866 Drell-Yan data change our picture of the chiral structure of the nucleon?

Non-perturbative high-energy QCD

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