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- W2079968362 abstract "Production of hyperons and antihyperons in the interactions of 6.935 BeV/c antiprotons with protons has been studied. A total of 80 000 pictures taken with the Brookhaven National Laboratory 80-in. liquid-hydrogen bubble chamber have been analyzed for all possible final states involving the production of a hyperon and/or an antihyperon. The total cross section for events in this category is 1.3ifmmodepmelsetextpmfi{}0.1 mb. Reactions leading to two-, three-, or four-body final states involving $ensuremath{Lambda}$ or $ensuremath{Sigma}$ hyperons (or their antiparticles) were produced highly peripherally. The angular distribution of the $ensuremath{Lambda}overline{ensuremath{Lambda}}$ final state can be fitted to ${K}^{*}$ (888) exchange when the absorptive effect of competing channels is taken into account. Ratios among cross sections of various hyperon-antihyperon pair states agree with predictions from $S{U}_{3}$ symmetry, assuming a dominant $K$ or ${K}^{*}$ exchange and an $F$-type coupling. Charge ratios of events with ${ensuremath{Sigma}}^{ifmmodepmelsetextpmfi{}}$ and ${{Y}_{1}}^{*ifmmodepmelsetextpmfi{}}$ (1385) are also consistent with single-particle-exchange models. We have examined the mass spectra of all possible mass combinations of all possible final states. The ${{Y}_{1}}^{*}$ (1385) was by far the most prominent resonance produced, and production of ${{Y}_{0}}^{*}$ (1405) and ${{Y}_{0}}^{*}$ (1520) was also observed. Although the energy available in the production center-of-mass system is 3.86 BeV, there was no statistically significant evidence for the production of any new meson or baryon resonance. A thorough search has been made for ${ensuremath{Omega}}^{ensuremath{-}}$ and ${overline{ensuremath{Omega}}}^{+}$ particles, but no event was found to be consistent with their production and decay." @default.
- W2079968362 created "2016-06-24" @default.
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- W2079968362 date "1966-12-23" @default.
- W2079968362 modified "2023-09-25" @default.
- W2079968362 title "Hyperon and Antihyperon Production inp¯−pCollisions at 7 BeV/c" @default.
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- W2079968362 doi "https://doi.org/10.1103/physrev.152.1171" @default.
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