Abstract
Pion photoproduction amplitudes are calculated from a set of equations that have been derived by coupling an external photon to all places in a dressed pion-nucleon vertex. The calculation is consistent with gauge invariance, charge conservation, unitarity, and covariance. To provide input to the photoproduction amplitude, a photon-nucleon vertex is calculated from a set of equations derived by complete attachment of photons to a dressed nucleon propagator. We check the accuracy of this vertex by extracting its nucleon electromagnetic form factors.
| Original language | English |
|---|---|
| Article number | 034001 |
| Number of pages | 18 |
| Journal | Physical Review C |
| Volume | 99 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 2019 |
Keywords
- Electromagnetic currents
- pion-nucleon system
- gauge invariance
- charge conservation
- Pion photoproduction