The Spin Dependence of Diffractive Processes and Implications for the Small $x$ Behaviour of $g_1$ and the Spin Content of the Nucleon

Abstract

We show that if the Lorentz transformation properties of diffraction are other than scalar, the $x\to 0$ behaviour of $g_1(x,Q^2)$ can grow. We compare with new data on $g_1^p$ from SMC, assess implications for sum rules and for future studies of sea polarisation.

9 pages + 1 figure added as a postscript file which should be stripped off before latexing

References in corpus (5)

• Measurement of the Spin-Dependent Structure Function $g_1(x)$ of the Proton
• CTEQ Parton Distributions and Flavor Dependence of Sea Quarks
• Consistent Analysis of the Spin Content of the Nucleon
• Proton structure function at small Q^2
• On the Q^2 Dependence of Measured Polarized Structure Funtions

Cited by in corpus (37)

• The Spin Structure of the Nucleon
• Measurements of the Proton and Deuteron Spin Structure Functions g1 and g2
• Deep Inelastic Scattering of Polarized Electrons by Polarized ${}^3$He and the Study of the Neutron Spin Structure
• Spin Structure of the Proton from Polarized Inclusive Deep-Inelastic Muon-Proton Scattering
• Quark helicity distributions in the nucleon for up, down, and strange quarks from semi--inclusive deep--inelastic scattering
• Polarized Parton Distributions in the Nucleon
• Spin Physics and Polarized Structure Functions
• Determination of the Bjorken Sum and Strong Coupling from Polarized Structure Functions
• The Spin Structure of the Proton
• Determination of ${\alpha }_s$ and the Nucleon Spin Decomposition Using Recent Polarized Structure Function Data
• The Spin Structure of the Nucleon
• A Next-to-Leading Determination of the Singlet Axial Charge and the Polarized Gluon Content of the Nucleon
• Q^2 Evolution of the Neutron Spin Structure Moments using a He-3 Target
• Scale Dependence and Small-x Behaviour of Polarized Parton Distributions
• Spin-Dependent Twist-Four Matrix Elements from g_1 Data in the Resonance Region
• Radiative Parton Model Analysis of Polarized Deep Inelastic Lepton Nucleon Scattering
• The Gerasimov-Drell-Hearn Sum Rule
• Is nucleon spin structure inconsistent with constituent quark model?
• Small- and large-x nucleon spin structure from a global QCD analysis of polarized Parton Distribution Functions
• x-Dependent Polarized Parton Distributions
• The proton spin puzzle: where are we today ?
• Analytic Approaches to the Evolution of Polarised Parton Distributions at Small $x$
• Updating spin-dependent Regge intercepts
• The proton spin sum rule chiral bag prediction, an update
• Spin constraints on Regge predictions and perturbative evolution in high energy collisions
• Theoretical issues of small $x$ physics
• Polarized Structure Functions in the Valence Quark and Resonance Regions and the GDH Sum
• Spin dependent structure function g_1 at low x and low Q^2
• The Bjorken sum rule with Monte Carlo and Neural Network techniques
• Sea polarisation and the Drell-Hearn-Gerasimov sum-rule(s)
• Towards an understanding of nucleon spin structure: from hard to soft scales
• Spin dependent structure function $g_1$ at small $x$ and small $Q^2$
• Spin structure function g_1 at low x: status and plans
• Different behaviour of the spin structure functions $g_1(x)$ and $h_1(x)$ at $x\to 0$
• Spin physics in deep inelastic scattering: Summary
• On the extreme behaviour of $g_1(x,Q^2)$ at $x\to 0$
• Status of Spin Physics - Experimental Summary