Studying Hadronic Structure of the Photon in Lattice QCD

We show that the matrix element of a local quark-gluon operator in the photon state, , can be calculated in lattice QCD. The result is generalized to other quantities involving space-like photons, including the transition form factor $\gamma\gamma^*\to \pi^0$ and the virtual-photon-nucleon Compton amplitude which can be used to define the generalized Drell-Hearn-Gerasimov and Bjorken sum rules.Comment: 7 pages, 1 figur

Monopole-antimonopole condensation in the interpolating Georgi-Glashow model

We study the three dimensional Georgi-Glashow model (which interpolates smoothly between pure U(1) and SU(2) limits) using a constrained cooling which preserves 't Hooft-Polyakov monopoles. We find that the monopole-antimonopole condensation gives an area law for the Wilson loops. The monopole contribution to the string tension is close to the Monte Carlo value in the intermediate region.Comment: 3 pages, 1 figure, LaTex with espcrc2.sty, talk presented at LATTICE97 by Chulwoo Jun