Double non-perturbative gluon exchange: an update on the soft Pomeron contribution to pp scattering

Abstract

We employ a set of recent, theoretically motivated, fits to non-perturbative unquenched gluon propagators to check in how far double gluon exchange can be used to describe the soft sector of pp scattering data (total and differential cross section). In particular, we use the refined Gribov--Zwanziger gluon propagator (as arising from dealing with the Gribov gauge fixing ambiguity) and the massive Cornwall-type gluon propagator (as motivated from Dyson-Schwinger equations) in conjunction with a perturbative quark-gluon vertex, next to a model based on the non-perturbative quark-gluon Maris-Tandy vertex, popular from Bethe-Salpeter descriptions of hadronic bound states. We compare the cross sections arising from these models with "older" ISR and more recent TOTEM and ATLAS data. The lower the value of total energy \sqrt{s}, the better the results appear to be.

14 pages, 8 .pdf figures. To appear in Phys.Rev.C

References in corpus (13)

• A refinement of the Gribov-Zwanziger approach in the Landau gauge: infrared propagators in harmony with the lattice results
• Baryons as relativistic three-quark bound states
• Pinch Technique: Theory and Applications
• Infrared propagators of Yang-Mills theory from perturbation theory
• Measurement of the total cross section from elastic scattering in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Indirect lattice evidence for the Refined Gribov-Zwanziger formalism and the gluon condensate $⟨A^2⟩$ in the Landau gauge
• Natural constraints on the gluon-quark vertex
• The quark-gluon vertex in Landau gauge bound-state studies
• Infrared Gluon and Ghost Propagators
• Non-perturbative aspects of Euclidean Yang-Mills theories in linear covariant gauges: Nielsen identities and a BRST invariant two-point correlation function
• BFKL pomeron with massive gluons and running coupling
• Complex angular momenta approach for scattering problems in the presence of both monopoles and short range potentials
• Gluon propagator in diffractive scattering

Cited by in corpus (1)

• An all order renormalizable Refined-Gribov-Zwanziger model with BRST invariant fermionic horizon function in linear covariant gauges