06 20 9 v 3 1 9 O ct 1 99 5 DOUBLE PION PHOTOPRODUCTION ON THE NUCLEON : STUDY OF THE ISOSPIN CHANNELS

@inproceedings{Tejedor19950629,
  title={06 20 9 v 3 1 9 O ct 1 99 5 DOUBLE PION PHOTOPRODUCTION ON THE NUCLEON : STUDY OF THE ISOSPIN CHANNELS},
  author={J. A. G{\'o}mez Tejedor and Eulogio Oset},
  year={1995}
}
A model for the γp → π + π − p reaction developed earlier is extended to account for all isospin channels. The model includes N , ∆(1232), N * (1440) and N * (1520) as intermediate baryonic states and the ρ-meson as an intermediate 2π resonance. Although many terms contribute to the cross section, some channels exhibit particular sensitivity to certain mechanisms of resonance excitation or decay and the reactions provide novel information on such mechanisms. In particular the γN → N * (1520… CONTINUE READING

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