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

ar X iv : h ep - p h / 97 05 45 5 v 1 2 8 M ay 1 99 7 LECTURE 1 Spectral Fluctuations of the QCD Dirac Operator

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

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 / 05 05 12 3 v 1 13 M ay 2 00 5 Microscopic Description of Deeply Virtual Compton Scattering off Spin - 0 Nuclei

We evaluate within a microscopic calculation the contributions of both coherent and incoherent deeply virtual Compton scattering from a spin-0 nucleus. The coherent contribution is obtained when the target nucleus recoils as a whole, whereas for incoherent scattering break-up configurations for the final nucleus into a an outgoing nucleon and an A−1 system are considered. The two processes enco...

ar X iv : h ep - p h / 97 10 54 8 v 2 5 N ov 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 is explored. Research supported in part by the National Science Foundation

ar X iv : h ep - p h / 94 05 25 5 v 1 9 M ay 1 99 4 6453 April , 1994 ( T / E ) Spin , Mass , and Symmetry