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 spacelike 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.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2001
- DOI:
- 10.1103/PhysRevLett.86.208
- arXiv:
- arXiv:hep-lat/0101014
- Bibcode:
- 2001PhRvL..86..208J
- Keywords:
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- High Energy Physics - Lattice;
- High Energy Physics - Phenomenology
- E-Print:
- 7 pages, 1 figure