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SLAC PUB 1314 T E October 1973 DIE FRACTIYE PROCESSES K C Moffeit Stanford Linear Accelerator Center Stanford University Stanford California Rapporteur talk Electron presented at the International and Photon Interactions Work supported Symposium on at High Energies Bonn August V 31 94305 1973 by the U S Atomic Energy Commission Introduction I In this diffractive talk I will process view the properties classical giving Before to summarize our present showing any data and characteristics picture rise try scattering in terms of t channel a separate Pomeron trajectory ties which is independent i diffractive at 8 0 and iii additional iii or grey disk The amount of we think the angular distribution shrinkage the scattering i basic imaginary proper ii peak amplitudes t distributions size of the target to a cross section whose and beam particle have been suggested becomes more peaked with In the Regge picture process in the t channel mainly of corresponds three scattering exponential properties a Pomeron exchange with ii The distribution Whatever the picture to the transverse energy scattering exchanges and diffraction In terms of dU dt we expect to find Over the years to re of energy or at most has a In s dependence distributions slope is related like In the Regge picture of energy have been used to signify ed angular from a black to a sharp peak in the angular is independent I would first of diffractive shows a wave scattering scattering knowledge of the trajectory is s channel increasing shrinkage results from a Cro Q t with 01 0 helicity conserving SCHC the quantum numbers of the vacuum I 0 and C 1 are exchanged iv the change in parity of the beam or target particle in the scattering process follows the natural spin parity series l J N where AJ spin change and pf and pi are the or Pf Pi 1 intrinsic parities Morrison Gribov of the outgoing rule l and incoming particles the These and other particle properties cross section such as equivalence and factorization of the



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