Abstract
The study of multi-particle final state in high-energy reactions has a long history. Detailed studies of hadronic interactions at Fermilab and at the CERN ISR have shown that particles are emitted in clear jets of hadrons along the beam directions. For the highest energies, a small fraction of events contains large-angle jets originating from hard collisions, in addition to the beam and target fragmentation products. The clearest observation of jets has been in high-energy e/sup +/e/sup -/ reactions. Hadronic interactions contain 5 or 6 valence quarks already in the initial state. The final state in e/sup +/e/sup -/ annihilation represents at the parton level a relatively simple dynamical system: a q anti q state plus possibly a hard gluon therefore jets produced in e/sup +/e/sup -/ annihilation have to be considered as the cleanest ones. The study of their properties can help, not only to understand quark fragmentation but may also serve as an important tool in the analysis of the much more complex mechanism in hadronic interactions. In this paper we present preliminary results of the overall features of our first sample of e/sup +/e/sup -/ annihilation events at 29 GeV. The data were taken using the High Resolutionmore » Spectrometer (HRS) operated at the PEP storage ring at the Stanford Linear Accelerator Center.« less
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