Vertex form factors of the rho-meson nucleon interaction at low momentum transfer |
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Authors: | J Flender M F Gari |
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Institution: | 1. Institut für Theoretische Physik, Ruhr-Universit?t Bochum, W-4630, Bochum, Federal Republic of Germany
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Abstract: | We calculated the one pion loop contributions to the form factors of the rho-nucleon interaction within a field theoretical model using effective Lagrangians. The results show that the tensor interaction is likely to be described well within such an approach. We obtain a magnetic coupling in the range of 3.5–7.1 atQ
2=0, depending on the choice of pion-nucleon form factor and a dipole form for theQ
2 dependence tensor form factor with a scale of roughly 900 MeV for space-like momentum transfer. The results agree with the findings of the recent analysis of thep-N interaction and support a small scale parameter (0.5 GeV) for the pion-nucleon form factor.This work is supported by BMFT (06BO7027) and COSY-KFA Jülich (41140512) |
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Keywords: | PACS" target="_blank">PACS 13 75 Cs 13 75 Gx |
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