Coherent Qcd Radiation from Active (t/e) and Spectator Jets at the Ssc’

Recently there has been important progress1-3 in understanding particle production mechanisms and coherent effects in QCD involving the =active” quark and gluons which participate in high momentum transfer reactions. However, the soft gluon radiation and hadronieation of the ‘spectator” constituents produced at low momentum transfer has not been discussed in detail. Since the hard scattering subproceases generally leave the spectators with non-cero color, radiation along the forward direction will occur. An understanding of the interference effects between active and spectator systems is necessary for a meaningful separation of high and low pr jets in the low z overlap region as well as for an interpretation of the high pr jet ‘pedestals”. In the case of collisions at the SSC, the properties of spectator jets [qq, (qqq)s, etc.] could in principle be used to distinguish the various hard scattering reactions.