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FIZIKA B 13 (2004) 2, 365-372
 
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
Received 1 September 2003; Accepted 26 April 2004
Online 14 November 2004
Using the virtual Primakoff effect, the PrimEx Collaboration at Jefferson Lab is
planning to perform the first high-precision measurements of the the p0,
h and h¢ 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.
PACS numbers: 11.30.Rd,13.60.Le,13.40.Gp
UDC 539.12
Keywords: Primakoff effect, transition form factors, pseudoscalar mesons, muon
anomalous magnetic moment
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