Analysis of recent CLAS data on photoproduction
arXiv:1702.06848 · doi:10.1103/PhysRevD.95.094005
Abstract
Based on the experimental data released recently by the CLAS Collaboration, the photoproduction off a proton target is investigated in an effective Lagrangian approach. In our model, -channel, -channel, and -channel Born terms are included to calculate the differential cross sections, which are compared with the recent CLAS experiment. An interpolating Reggeized treatment is applied to the channel, and it is found that the -channel contribution is dominant in the photoproduction and the -channel contribution is responsible for the enhancement at backward angles. The present calculation does not take into account any explicit -channel nucleon-resonance contribution; nevertheless, our model provides a good description of the main features of the data. It suggests small couplings of the and the nucleon resonances in this energy region.
5 pages, 3 figures
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