Nucleon Form Factors of the Isovector Axial-Vector Current: Situation of Experiments and Theory
M. R. Schindler, S. Scherer
Abstract
The theoretical and experimental status of the isovector axial-vector current form factors GA(q2) and GP(q2) of the nucleon is reviewed. We also describe a new calculation of these form factors in manifestly Lorentz-invariant chiral perturbation theory (ChPT) with the inclusion of axial-vector mesons as explicit degrees of freedom.
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