Date of Award
Doctor of Philosophy (PhD)
Cross sections were measured for the reaction 1H(e, e′π+) n at the energy W = 1.95 GeV and momentum transfer Q2 = 0.6 (GeV/c)2. At this W and Q2, the longitudinal cross section is dominated by t-channel production, giving a unique opportunity to examine the strong coupling form factor gπNN(t). The measured cross sections were separated using a method similar to a Rosenbluth separation. For the extraction of gπNN(t), the Actor and Körner model  and a parameterization of the MAID2000 model  were employed to fit the longitudinal cross section. Three parameterizations gπNN(t) were used in both models. These fits resulted in a strong coupling constant gπNN[m2π] that is consistent with theoretical predictions. However, this coupling constant leads to a cutoff parameter that is less than 1 GeV.
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Vansyoc, Kelly G..
"Measurement of the gπNN(t) Form Factor"
(2001). Doctor of Philosophy (PhD), Dissertation, Physics, Old Dominion University, DOI: 10.25777/6d27-9n81