Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8187655 | Physics Letters B | 2013 | 6 Pages |
Abstract
We have studied the γpâK0Σ+ reaction in the energy region around the KâÎ and KâΣ thresholds, where the CBELSA/TAPS cross section shows a sudden drop and the differential cross section experiences a transition from a forward-peaked distribution to a flat one. Our coupled-channel model incorporates the dynamics of the vector meson-baryon interaction which is obtained from the hidden gauge formalism. We find that the cross section in this energy region results from a delicate interference between amplitudes having KâÎ and KâΣ intermediate states. The sharp downfall is dictated by the presence of a nearby Nâ resonance produced by our model, a feature that we have employed to predict its properties. We also show results for the complementary γnâK0Σ0 reaction, the measurement of which would test the mechanism proposed in this work.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
A. Ramos, E. Oset,