About three decades after the first experiments on deep inelastic lepton hadron scattering began to investigate the structure of hadrons, the history of this fruitful field of particle physics continues in the broad spectrum of research performed at the electron and positron proton collider HERA at DESY, where the multipurpose detectors ZEUS and H1 access ep scattering at a center of mass energy of 300 GeV and explore as yet uncharted kinematic realms of deep inelastic scattering. After the first years of data taking at HERA, each of the experiments has collected a total of roughly 40 pb 1 of e+p data, yielding sensitivity to deep inelastic e+p interactions at high four momentum transfers, Q2, where typi cal cross sections drop into the subpicobarn regime. This kinematic domain is characterized by electroweak unification, manifesting itself most markedly in the neutral and charged current cross sections, which approach an equal order of magnitude as Q2 rises above the square of the W and Z masses. Consequently, HERA allows, for the first time, studies of both types of pro cesses simultaneously with the same initial state conditions and in the same detector, and thus we can investigate the interplay of electroweak and strong forces governing the respective cross sections.

This volume is centered on recent developments in the exploration of hadronic structure through lepton scattering, in the description of hadron physics directly from lattice QCD and non-perturbative QCD models, and in efforts to strengthen the links between these activities. Specific topics that are covered include: parton distribution functions, polarized structure functions, generalized structure functions, nuclear effects, quark-hadron duality, electromagnetic form factors, structure functions and hadron properties from lattice QCD, and QCD models based on the DysonOCoSchwinger equations. Contents: Partonic Structure of Hadrons: Chiral Extrapolation of Lattice Structure Function Calculations (W Detmold); Exclusive Processes at HERMES (N Bianchi); Soft Pion Production Associated with Deeply Virtual Compton Scattering (L Mosse); Spin Structure of Hadrons: Polarized Structure Functions in QCD (J Kodaira); Single Spin Asymmetries and Quark Fragmentation (M Anselmino et al.); Perturbative OCo Nonperturbative QCD Transition: Lepton Scattering and Quark-Hadron Duality Studies at Jlab (R Ent); Estimating Low Energy Model Parameters from Deep Inelastic Scattering (L P Hoyt & A I Signal); Form Factors: Physical Hadron Properties from Lattice Data at Large Quark Masses (A W Thomas); Electromagnetic Interactions in Light Front Dynamics (J -F Mathiot); Nucleon Form Factors in the Covariant Diquark-Quark Model (R Alkofer & M Oettel); Hadron Excitations, Confinement and Chiral Symmetry Breaking: Experimental Studies of the Hadron Spectrum (J Napolitano); The Character of Goldstone Bosons (M B Hecht et al.); Deconfining by Winding (R Hofmann); Small- x Physics and Nuclear Medium Effects: Leading Nucleon Production at HERA (G Levman); Nuclear Medium Effects at HERMES (P di Nezza); Physics Motivation for a Polarized Electron-Ion Collider (J M Cameron & J T Londergan); and other papers. Readership: Theoretical and experimental researchers in nuclear and high energy physics."

Measurements of the Collins and Sivers asymmetries for charged pions and charged and neutral kaons produced in semi-inclusive deep-inelastic scattering of high energy muons off transversely polarised protons are presented. The results were obtained using all the available COMPASS proton data, which were taken in the years 2007 and 2010. The Collins asymmetries exhibit in the valence region a non-zero signal for pions and there are hints of non-zero signal also for kaons. The Sivers asymmetries are found to be positive for positive pions and kaons and compatible with zero otherwise.

This volume is centered on recent developments in the exploration of hadronic structure through lepton scattering, in the description of hadron physics directly from lattice QCD and non-perturbative QCD models, and in efforts to strengthen the links between these activities. Specific topics that are covered include: parton distribution functions, polarized structure functions, generalized structure functions, nuclear effects, quark-hadron duality, electromagnetic form factors, structure functions and hadron properties from lattice QCD, and QCD models based on the Dyson-Schwinger equations.