Test of fundamental symmetries via the Primakoff effect
University of North Carolina Wilmington, NC, USA
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Published online: 9 June 2014
The three neutral pseudoscalar mesons, π0, η and η′, represent one of the most interesting systems in strong interaction physics. A study of the electromagnetic properties of these mesons provides a sensitive probe of the symmetry structure of QCD at low energy. A comprehensive experimental program at Jefferson Laboratory (Jlab) is aimed at gathering high precision measurements on the two-photon decay widths and transition form factors at low Q2 of π0, η and η′ via the Primakoff effect. The completed experiments on the π0 radiative decay width at Jlab 6 GeV, and other planned measurements at Jlab 12 GeV will provide a rich laboratory to test the chiral anomaly and to study the origin and dynamics of chiral symmetry breaking at the confinement scale of QCD.
© Owned by the authors, published by EDP Sciences, 2014
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