edited by Sebastian Kuhn (Old Dominion University, USA) & Jian-Ping Chen (Thomas Jefferson National Accelerator Facility, USA)

This volume presents an overview of the many new and exciting results, both theoretical and experimental, in the area of spin structure functions and sum rules at low to moderate photon virtuality Q². It includes contributions from many leading scientists in the field worldwide.

The volume covers the following topics:

• recent results on the Gerasimov-Drell-Hearn (GDH) sum rule with real photons and its extensions to virtual photons

• inclusive spin structure functions at low to moderate Q² and their moments

• exclusive measurements of nucleon spin structure in the resonance region

• spin polarizabilities and Compton scattering

• chiral perturbation theory and other low-energy limits of QCD

• lattice QCD, duality, and phenomological models

• nuclear effects and the GDH sum rule in nuclei

• experimental techniques (polarized targets and beams)

• future plans and projects

• What are These Sum Rules Good For? (X Ji)
• Structure of the Nucleon: Spin Observables (U Meissner)
• Experimental Verification of the GDH Sum Rule (K Helbing)
• Status of the GDH Experiment on the Deuteron at MAMI (O Jahn)
• Study of the Polarized Structure Functions of the Neutron at Low Q² Using Polarized ³He (S Choi)
• The First Moment of g₁ Measured with the CLAS Detector (G Dodge)
• Quark Hadron Duality Tests on Polarized Structure Functions Using CLAS (T Forest)
• Proton Spin Structure at High Parton Densities (B Badelek)
• Nucleon Spin Structure and Its Connections to Various Sum Rules (J Soffer)
• Spin Asymmetries for Exclusive and Semi-Exclusive Reactions with CLAS (A Biselli)
• Helicity Dependence of the Nπ(π) Processes on the Proton: New Results from Mainz (P Pedroni)
• Strangeness Photoproduction and the GDH Experiments at LEPs (Y Ohashi)
• What We are Learning about the Quark Structure of Hadrons from Lattice QCD (J Negele)
• Higher Twists in Spin Structure Functions from a “Constituent Quark” Point of View (A Sidorrov & C Weiss)
• Polarized Structure Functions and the GDH Integral from Lattice QCD (G Schierholz)
• Spin Asymmetry and GDH Sum Rule for Real and Virtual Photons for the Deuteron (H Arenhövel et al.)
• The Generalized GDH Sum for ³He (K Slifer)
• A Study of the Final State Effects in the Electro-disintegration of a Polarized Helium-3 Target (G Salmè et al.)
• and other papers