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The present experimental data of elastic pp scattering suggest that the asymptopia in the Chou-Yang picture for elastic hadron-hadron diffraction scattering may be nearly realized in the energy region of the CERN Super Proton Synchrotron and the Fermilab Tevatron Collider, ͱsϭ0.5-1.8 TeV. The analysis gives information on the root mean square radius of the gluon distribution in the proton ( r g ϵ͗r gluon 2 ͘ p 1/2 ), which is estimated to be 0.87Շ r g Շ0.95 fm. ͓S0556-2821͑98͒01003-0͔

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