Abstract
The production of η, η′, ω, φ, mesons, as well as λ and ∑ hyperons has been measured in proton-proton reactions with an incident beam momentum of 3.67 GeV/c with DISTO spectrometer at SATURNE. The first observation of the φ meson near the production threshold and the φ/ω cross sections ratio has been compared to predictions based on the OZI rule and on one-boson-exchange models. Measured inclusive cross section for K- mesons production is about a factor of 20 lower than for inlcusive K+ production at the same CM energy above threshold. This fact is in strong contrast to cross sections observed in sub-threshold heavy ion collisions. The production of η and η′ mesons has also been measured, in an effort to gain information on the η′-nucleon coupling. The normal spin transfer coefficient (DN N) has been determined for exclusive hyperon production with a polarized beam. A large negative coefficient has been observed, which is qualitatively consistent with expectations for a mechanism dominated by kaon-exchange and rescattering.
Lingua originale | Inglese |
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pagine (da-a) | 2419-2429 |
Numero di pagine | 11 |
Rivista | Acta Physica Polonica B |
Volume | 31 |
Numero di pubblicazione | 10-11 |
Stato di pubblicazione | Pubblicato - 2000 |
Pubblicato esternamente | Sì |