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Abstract: There is an extensive history of form factor calculations on the lattice,primarily with ground states for both initial and final states. However, therehave never been any radially excited transition form factor calculations.Furthermore, the lattice faces difficulty in extracting signal from noise atlarge transfer momenta $Q^2$. These measurements could give importanttheoretical input to experiments, such as those of JLab-s 12 GeV program andstudies of deformation of the nucleon. In this work, I will present a simpletechnique to resolve both of these difficulties and present results fromanisotropic configurations showing improved signals for excited-statequantities. It should also be possible to apply this technique to isotropiclattices for calculating large-$Q^2$ form factors.



Autor: Huey-Wen Lin, Saul D. Cohen, Robert G. Edwards, Kostas Orginos, David G. Richards

Fuente: https://arxiv.org/







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