The production of eta, eta', omega, phi, mesons, as well as Lambda and Sigma 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 phi meson near the production threshold and the phi/omega 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 eta and eta' masons has also been measured, in an effort to gain information on the eta'-nucleon coupling. The normal spin transfer coefficient (D-N 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.

Meson and hyperon production results from the DISTO spectrometer at SATURNE

BALESTRA, Ferruccio;BERTINI, Raimondo Pietro;BUSSA, Maria Pia;FAVA, Luciano;FERRERO, Livio;FROLOV, VLADIMIR;GRASSO, Antonino;MAGGIORA, MARCO;PIRAGINO, Guido;ZOSI, Gianfranco
2000-01-01

Abstract

The production of eta, eta', omega, phi, mesons, as well as Lambda and Sigma 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 phi meson near the production threshold and the phi/omega 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 eta and eta' masons has also been measured, in an effort to gain information on the eta'-nucleon coupling. The normal spin transfer coefficient (D-N 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.
Meson 2000, International Workshop on Meson Production, Properties and Interaction
KRAKÓW, POLAND
2000/05/19 - 2000/05/23
31
2419
2429
PROTON-PROTON COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; TOTAL CROSS-SECTION; NEAR-THRESHOLD; PHI-MESON; OZI-RULE; ETA' PRODUCTION; SPIN TRANSFER; SIGMA-TERM; (P)OVER-BAR-P ANNIHILATION
Salabura P; Balestra F; Bedfer Y; Bertini R; Bland LC; Brochard F; Bussa MP; Chalyshev V; Choi S; Dzemidzic M; Faivre JC; Falomkin IV; Fava L; Ferrero L; Foryciarz J; Frolov V; Frohlich I; Garfagnini R; Gill D; Grasso A; Heinz S; Ivanov VV; Jacobs WW; Kuhn W; Maggiora A; Maggiora M; Manara A; Panzieri D; Pfaff HW; Piragino G; Pontecorvo GB; Popov A; Ritmann J; Tosello F; Vigdor SE; Zosi G
File in questo prodotto:
File Dimensione Formato  
2000_ActaPhysPol_31_2419-2429.pdf

Accesso riservato

Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 248.08 kB
Formato Adobe PDF
248.08 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/77452
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact