Meson and hyperon production results from the DISTO spectrometer at SATURNE

Citation
P. Salabura et al., Meson and hyperon production results from the DISTO spectrometer at SATURNE, ACT PHY P B, 31(10-11), 2000, pp. 2419-2429
Citations number
61
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA POLONICA B
ISSN journal
0587-4254 → ACNP
Volume
31
Issue
10-11
Year of publication
2000
Pages
2419 - 2429
Database
ISI
SICI code
0587-4254(200010/11)31:10-11<2419:MAHPRF>2.0.ZU;2-
Abstract
The production of eta, eta', omega, phi, mesons, as well as Lambda and Sigm a hyperons has been measured in proton-proton reactions with an incident be am momentum of 3.67 GeV/c with DISTO spectrometer at SATURNE. The first obs ervation of the phi meson near the production threshold and the phi/omega c ross sections ratio has been compared to predictions based on the OZI rule and on one-boson-exchange models. Measured inclusive cross section for K- m esons production is about a factor of 20 lower than for inlcusive K+ produc tion at the same CM energy above threshold. This fact is in strong contrast to cross sections observed in sub-threshold heavy ion collisions. The prod uction of eta and eta' masons has also been measured, in an effort to gain information on the eta'-nucleon coupling. The normal spin transfer coeffici ent (D-N N) has been determined for exclusive hyperon production with a pol arized beam. A large negative coefficient has been observed, which is quali tatively consistent with expectations for a mechanism dominated by kaon-exc hange and rescattering.