Abstract
We consider a Reggeized quark model in which the hadrons contain a quark-antiquark core in addition to the valence quarks. Reggeons and pomerons are allowed to couple to both valence and core quarks. The core leads to a term in the cross-section which is proportional to the product of nonstrange quark number times the total quark number. It is able to explain Lipkin’s third component in the total crosssections and breaks additivity at the 10% level. At the present level of accuracy, the model allows the exclusive use of strongly exchangedegenerate Regge trajectories. The observed breaking of exchange degeneracy in the data is due to the presence of a nonstrange core. A comparison with the data shows that, at high energies, this model accounts quite satisfactorily for all the qualitative and quantitative features of the well-measured hadronic total cross-sections and for the ratios of the real to imaginary parts of the forward scattering amplitudes. Predictions for other cross-sections of theoretical interest are given.
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