Conference paper
Measuring the transition form factors of pseudoscalar mesons at low Q2
D. S. Dale (for the PrimEx Collaboration)
; University of Kentucky, Department of Physics and Astronomy, Lexington, KY, USA 40506
Abstract
Using the virtual Primakoff effect, the PrimEx Collaboration at Jefferson Lab is planning to perform the first high-precision measurements of the the π 0 , η and η ′ transition form factors at very low Q2 (∼ 0.001 − 0.5 GeV2 ). The slopes of the transition form factors approximately measure the spatial distribution of the axial anomaly. The proposed instrumentation to be constructed for this program will be of general utility for both this program and future experiments, and will provide a new and powerful tool to study QCD at Jefferson Laboratory. In addition, knowledge of the transition form factors of the pseudoscalar mesons comprise an important element in the determination of the muon anomalous magnetic moment. These measurements are thus important for the search for “new physics” beyond the Standard Model.
Keywords
Primakoff effect; transition form factors; pseudoscalar mesons; muon anomalous magnetic moment
Hrčak ID:
305687
URI
Publication date:
1.6.2004.
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