Finite Energy Sum Rules and Duality of Sakaton Rearrangement Diagrams
Masahiro Imachi A · Progress of Theoretical Physics · 1970
It will be found that the amplitude X (a sakaton rearrangement amplitude with the t-u channel duality) should behave as repulsive backgrounds and the amplitude H (a sakaton rearrangement amplitude with the s-t channel duality) should behave as resonances at low energies, in order to reproduce the high energy behavior correctly, i. e. a prominent negative real part of X and a positive imaginary part of H.