Abstract
Assuming that the π+π− photoproduction at forward angles and high energies is dominated by one pion exchange we calculate the π+π− mass distributions for low partial waves. Predictions of the model agree well with the experimental data which indicate that the S, P and D waves are dominated by the f0(980), ρ(770) and f2(1270), resonances respectively.
Highlights
Assuming that the π+π− photoproduction at forward angles and high energies is dominated by one pion exchange we calculate the π+π− mass distributions for low partial waves
Instead of assumstudies we have shown that S and D resonances are ing a particular exchange mechanism, we generalize copiously produced in di-pion photoproduction [2, 3]. the conventional formulation of the Deck model [5, 6] In those studies we assumed that the di-pion photo- by applying the phenomenological set of pion-nucleon amplitudes obtained by the SAID group [7] and to de
In our approach we combine the Deck model, which accounts for the extended source mode of the photoproduction, with the SAID parametrization of πN scattering amplitudes
Summary
Assuming that the π+π− photoproduction at forward angles and high energies is dominated by one pion exchange we calculate the π+π− mass distributions for low partial waves. Scribe the final state interactions in the ππ channel we use a set of partial wave amplitudes from a recent analysis in [8]. L and isospin, I = 0, 1, 2 the final state interactions are described by the ππ partial wave amplitudes, tIl that are given by the phase shifts δlI and inelasticity parameters ηlI , tIl
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