Radiative processes of nucleon interactions and possible existence of exotic dibaryons

Abstract

The cross section of the reaction $pp\to pp\gamma \gamma$ is estimated and the exploration possibilities of this reaction to probe for a possible excitation of subnuclear degrees of freedom in two-nucleon systems, in particular, the production and decay of the NN-decoupled dibaryon resonances, are briefly discussed.Some arguments for and implications of the intermediate dibaryon resonance excitation are inferred from preliminary data on the two-photon yield and energy distribution observed by the DIBAR2$\gamma$ - Collaboration at the kinetic energy of the initial proton $T_{lab}\simeq 200MeV$.

Comments: 7 pages, Latex, no figures, Talk given at the 13th International Seminar "Relativistic Nuclear Physics and Quantum Chromodynamics", Dubna, 2-7 Sept. 1996, and at International Workshop "Symmetry and Spin", Prague, 24-30 August 1997