Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2008-10-28
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 5 figures. Talk given at the XXVI International Symposium on Lattice Field Theory (LATTICE 2008), July 14-19, 2008, W
Scientific paper
There is an extensive history of form factor calculations on the lattice, primarily with ground states for both initial and final states. However, there have never been any radially excited transition form factor calculations. Furthermore, the lattice faces difficulty in extracting signal from noise at large transfer momenta ($Q^2$). These measurements could give important theoretical input to experiments, such as those of JLab's 12 GeV program and studies of deformation of the nucleon. In this work, I will present a simple technique to resolve both of these difficulties and present results from anisotropic configurations showing improved signals for excited-state quantities. It should also be possible to apply this technique to isotropic lattices for calculating large-$Q^2$ form factors.
Cohen Saul D.
Edwards Robert G.
Lin Huey-Wen
Orginos Kostas
Richards David G.
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