Phenomenological Theories of High Energy Scattering: An Experimental Evaluation

angular distributions angular momentum approximate asymptotic backward peaks Barger baryon exchange behavior BeV/c BeV/c)² CERN Chapter Charge Exchange classification Cline CMSR conspiracy contributions differential cross section direct channel resonances do/dt do/du elastic scattering energy dependence exchange amplitudes exchange degeneracy exchange model extrapolation fermion fermion Regge FESR GeV/c helicity amplitudes high energy data high energy scattering Hypercharge isospin kinematic laboratory momentum Letters 16 Letters 20 Letters 26B line reversed low energy MacDowell mass meson exchange momenta momentum transfer multiplets nucleon Nuovo Cimento octet parity doublets particle recurrences Photoproduction Phys pion PLab polarization Pomeranchuk predictions quantum numbers R. J. N. Phillips Regge amplitude Regge exchange Regge pole Regge Pole Model Regge Recurrences Regge trajectories Regge-Pole Model S-Matrix scattering amplitude scattering processes shown in Figure solid curves spin Sum Rules symmetry t-channel total cross sections values vanish wrong signature zero πρ