The QCD-Oriented Vector Dominance Model
The total photoabsorption cross section on the nucleon is studied using nondiagonal GVDM. Vector meson-nucleon scattering amplitudes are calculated in two-gluon exchange approximation of QCD. The off-diagonal transitions of diffraction dissociation type between different vector mesons and their cont...
| Main Authors: | , |
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| Format: | Report |
| Language: | unknown |
| Published: |
arXiv
1999
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.48550/arxiv.hep-ph/9908263 https://arxiv.org/abs/hep-ph/9908263 |
| Summary: | The total photoabsorption cross section on the nucleon is studied using nondiagonal GVDM. Vector meson-nucleon scattering amplitudes are calculated in two-gluon exchange approximation of QCD. The off-diagonal transitions of diffraction dissociation type between different vector mesons and their contributions to the expression for the total photoabsorption cross section on the nucleon are also calculated. It is shown that destructive interference of diagonal and off-diagonal terms is not effective. The main conclusion is that a p-cut-off in gamma-quark antiquark transition is necessary for obtaining the convergence in the summation over all vector meson contributions. : HTML+GIF, Talk given at the First Arctic Workshop on Cosmic Ray Muons, Finland, April 1999 |
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