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The inclusive proton spectrum for\(\bar pd \to 3\pi p\) at rest re-examined

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

We re-analyze the spectator proton distribution for ¯pd→π + π− π− p. For this channel previous calculations underestimated the cross section for proton momenta of 300 to 600 MeV/c by about a factor 7 while the channels with higher pion multiplicities and the ¯pd→K¯ Kmπp reactions were well explained. By using detailed experimental information on ¯pn and ¯pp annihilation, meson rescattering can in fact explain the cross section also for the 3π case. The¯ pp annihilation followed by charge exchange pion rescattering is much larger than in the 5π case. Vector meson exchange is small but not negligible at high spectator momenta.

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Authors and Affiliations

  1. Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland

    M. P. Locher & B. S. Zou

Authors
  1. M. P. Locher
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  2. B. S. Zou
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Additional information

We thank C. Amsler, C. G. Fasano and P. Truöl for helpful discussions and Roland Rosenfelder for reading the manuscript.

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Locher, M.P., Zou, B.S. The inclusive proton spectrum for\(\bar pd \to 3\pi p\) at rest re-examined. Z. Physik A - Hadrons and Nuclei 340, 187–190 (1991). https://doi.org/10.1007/BF01303831

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  • DOI: https://doi.org/10.1007/BF01303831

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