ar X iv : h ep - p h / 97 10 20 1 v 1 1 O ct 1 99 7 “ Electromagnetic ” Answer to the Nucleon Spin Puzzle

ar X iv : h ep - p h / 97 10 54 8 v 1 3 0 O ct 1 99 7 Chiral Perturbation Theory and Nucleon Polarizabilities ∗

Compton scattering offers in principle an intriguing new window on nucleon structure. Existing experiments and future programs are discussed and the state of theoretical understanding of such measurements are explored. Research supported in part by the National Science Foundation

ar X iv : h ep - p h / 97 10 20 1 v 2 2 5 M ay 1 99 8 “ Electromagnetic ” Contribution to the Nucleon Spin

A possible resolution to the question of where the nucleon gets some portion of its internal angular momentum, not carried by the valence quarks, is given in terms of the electromagnetic field angular momentum of the nucleon. This field angular momentum is similiar in origin to that of the Thomson dipole (an electric charge and a magnetic monopole), but arises from the interaction of the quark ...

ar X iv : h ep - p h / 97 10 46 5 v 1 2 4 O ct 1 99 7 Can Transversity Be Measured ?

I review the ways that have been proposed to measure the quark transversity distribution in the nucleon. I then explain a proposal, developed by Xuemin Jin, Jian Tang and myself, to measure transversity through the final state interaction between two mesons (ππ, KK, or πK) produced in the current fragmentation region in deep inelastic scattering on a transversely polarized nucleon.

ar X iv : h ep - p h / 97 10 24 9 v 1 6 O ct 1 99 7 HADRONIC PHYSICS FROM THE LATTICE

ar X iv : h ep - p h / 97 10 22 9 v 1 2 O ct 1 99 7 SLAC - PUB - 7663 October 1997 Z ′ INVESTIGATIONS AT FUTURE LEPTON