Universality of urbaryon rearrangement amplitudes

The concept of universality of urbaryon rearrangement amplitudes is introduced, in which the amplitudes of the same type of urbaryon rearrangement for meson-meson, meson-baryon and baryon-(anti)baryon scattering are described as common with each other and the amplitudes of each type are counted even in the presence of the U(6) symmetry breaking, i.e., not pure f-type coupling. Relations for helicity non-flip and flip amplitudes are obtained on the basis of the concept of universality. Above all, it should be noticed that the following results are derived: (i) The relations which comprise the Johnson-Treiman relations and the Freund relations as special cases are obtained and in good agreement with experiments if one takes D/F ratio of helicity non-flip part as F+ = f+/(f+ + d+) = 1.5. (ii) Universality relations for t-channel iso-scalar part in helicity non-flip and flip amplitudes hold independently of D/F ratios. (iii) Universality relations for t-channel iso-vector part depend on D/F ratios. (iv) The experimental ratio of polarizations for K+p-elastic scattering to that for pp-one can be explained reasonably. These results give support to the view that the countable nature of constituent urbaryons reflects on the scattering amplitudes for hadronic reactions. Furthermore, the validity of the universality of urbaryon rearrangement amplitudes suggests that urbaryon rearrangement interaction shares a coupling strength independent of the number of spectator urbaryons (the universality of urbaryon rearrangement interaction).