Nucleon structure and spin effects in elastic hadron scattering

TL;DR

This paper investigates the role of spin effects in elastic nucleon scattering, analyzing spin-dependent phenomena and comparing model predictions with experimental data across a range of energies.

Contribution

It introduces an analysis of spin-dependent pomeron effects and supports the existence of an energy-independent hadron spin flip amplitude based on experimental data.

Findings

Support for energy-independent spin flip amplitude

Analysis of spin-dependent pomeron effects

Agreement with experimental data at high energies

Abstract

Soft diffraction phenomena in elastic nucleon scattering are considered from the viewpoint of the spin dependence of the interaction potential. Spin-dependent pomeron effects are analyzed for elastic $pp$ scattering, spin-dependent differential cross sections and spin correlation parameters are calculated. The spin correlation parameter $A_N$ is examined on the basis of experimental data from $\sqrt{s} = 4.9 \ GeV$ up to $23.4 \ $GeV in the framework of the extended High Energy Generalized Structure (HEGS) model. It is shown that the existing experimental data of proton-proton and proton-antiproton elastic scattering at high energy in the region of the diffraction minimum and at large momentum transfer give the support of the existence of the energy-independent part of the hadron spin flip amplitude.