Spin-Spin Correlations in Proton-Proton Collisions at High Energy and Threshold Enhancements

摘要

The striking effects in the spin structure observed in elastic proton collisions and the Nuclear Transparency phenomenon recently discovered at BNL are described in terms of heavy quark threshold enhancements. The deviations from scaling laws and the broadening of the angular distributions at resonance are also consistent with the introduction of new degrees of freedom in the pp system. This implies new s-channel physics. Predictions are given for the spin effects in pp collisions near 18.5 GeV/c at large p/sub T/ s where new measurements are planned. 9 refs., 4 figs. (ERA citation 13:044090)