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Utilizing a missing mass technique we investigate the pp --> ppX reactionscanning beam energies in the range permitting to create a mass close to thatof the f0(980) and a0(980) scalar resonances, but still below the K^+K^-threshold where they decay dominantly into pi pi and pi eta mesons,respectively. Prior to the data analysis we introduce a notion of the close tothreshold total cross section for broad resonances.  We estimated for the overlapping mesons a0 and f0 the total cross section tobe smaller than 430 nb at excess energy of Q = 5 MeV.  The experiment have been performed at the Cooler Synchrotron COSY using theCOSY-11 facility.Comment: 11 pages, 6 figures, submitted to J. Phys. G: Nucl. Phy

journal of physics. g, nuclear and particle physics

Upper limit for the cross-section of the overlapping scalar resonancesf0(980) anda0(980) produced in proton–proton collisions in the range of the reaction threshold