Abstract
Resonance peaks observed in the cross sections of the reaction pp → {pp}sπ0, where {pp}s is the 1S0 state of the proton pair, and pd → pdππ in the GeV region are considered in the framework of mechanisms involving known baryon and two-baryon resonances.
Highlights
Before to discuss resonance structures observed recently in pp- and pd-collisions in the GeV region and their possible connection with exotic dibaryon states it is worth to remind some facts from physics at intermediate energies
A possible way to suppress the Δ-contribution was suggested in [6] where the reaction pd → {pp}sn with the final diproton {pp}s in the 1S 0 state instead of the deuteron was studied in kinematics of pd- backwardelastic scattering
The corresponding experiment was performed at ANKE@COSY [8] and measured observables were found to be very sensitive to behaviour of NN-interaction potential at short distances
Summary
Before to discuss resonance structures observed recently in pp- and pd-collisions in the GeV region and their possible connection with exotic dibaryon states it is worth to remind some facts from physics at intermediate energies. Just at 670 MeV in the reaction of backward elastic scattering of protons off the deuteron pd → d p the excitation of the Δ(1232)-isobar dominates. A possible way to suppress the Δ-contribution was suggested in [6] where the reaction pd → {pp}sn with the final diproton {pp}s in the 1S 0 state instead of the deuteron was studied in kinematics of pd- backward (quasi)elastic scattering.
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