Hard scattering and jets: from pp collisions in the 1970’s to Au + Au collisions at RHIC
Physics Department, 510c Brookhaven National Laboratory, NY 11973-5000, Upton, USA
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Published online: 15 June 2005
Hard scattering in pp collisions, discovered at the CERN ISR in 1972 by the method of leading particles, proved that the partons of Deeply Inelastic Scattering strongly interacted with each other. Further ISR measurements utilizing inclusive single or pairs of hadrons established that high particles are produced from states with two roughly back-to-back jets which are the result of scattering of constituents of the nucleons as described by Quantum Chromodynamics (QCD), which was developed during the course of these measurements. These techniques, which are the only practical method to study hard-scattering and jet phenomena in Au + Au central collisions at RHIC energies, are reviewed, with application to present RHIC measurements.
© Springer-Verlag, 2005