Studying Hadronic Structure of the Photon in Lattice QCD
Abstract
We show that the matrix element of a local quark-gluon operator in the photon state, <γ(kλ)| O| γ(kλ)>, can be calculated in lattice QCD. The result is generalized to other quantities involving space-like photons, including the transition form factor γγ* π0 and the virtual-photon-nucleon Compton amplitude <γ*N |γ*N> which can be used to define the generalized Drell-Hearn-Gerasimov and Bjorken sum rules.
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