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Charged pion spectra and energy transfer following antiproton annihilation at rest in carbon and uranium |
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| Authors: | E. D. Minor T. A. Armstrong R. Bishop V. Harris R. A. Lewis G. A. Smith |
| Affiliation: | 1. Laboratory for Elementary Particle Science, Department of Physics, 303 Osmond Laboratory, Pennsylvania State University, University Park, Pennsylvania, USA 2. Pennsylvania State University, USA 3. Aerospace Engineering Department, Pennsylvania State University, USA |
| Abstract: | The momentum spectra of charged pions following antiproton annihilation at rest in carbon and uranium have been measured. This information complements our previous measurement of the neutral pion spectra. The total charged pion multiplicity is 2.84±0.10 and 2.47±0.09 for carbon and uranium, respectively, in good agreement with recent INC model predictions of 2.96 and 2.48 for the same quantities. However, structures predicted by the model near 200 MeV/c and 300 MeV/c related to delta-resonance production are not seen in the data. The total energy transfers to the nucleus are calculated to be 119±59 MeV(carbon) and 455±50 MeV(uranium). The possibility of exciting multifragmentation with a¯p beam impinging on heavy nuclei is discussed. |
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