π−A1 interference in πN → ϱN |
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| Authors: | AC Irving |
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| Institution: | Department of Applied Mathematics and Theoretical Physics, University of Liverpool, Liverpool, UK |
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| Abstract: | An estimate of the A1NN coupling is made using axial vector meson dominance of weak form factors, PCAC and current algebra. We use this to predict a vanishingly small polarisation due to unnatural parity exchanges in πN → ?N near the forward direction. In contrast, the contribution to πN → ωN of the Z (the JPC = 2?? exchange degenerate partner of the A1) is found to be significant as indeed indicated by experiment. |
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