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28 March 2024
 
  » pubmed » pmid16907232

 Article overview


Near-threshold production of phi mesons in pp collisions
M Hartmann ; Y Maeda ; I Keshelashvili ; H R Koch ; S Mikirtytchiants ; S Barsov ; W Borgs ; M Büscher ; V I Dimitrov ; S Dymov ; V Hejny ; V Kleber ; V Koptev ; P Kulessa ; T Mersmann ; S Merzliakov ; A Mussgiller ; M Nekipelov ; M Nioradze ; H Ohm ; K Pysz ; R Schleichert ; H J Stein ; H Ströher ; K-H Watzlawik ; P Wüstner ;
Date 23 Jun 2006
Journal Phys Rev Lett, 96 (24), 242301
AbstractThe pp-->ppphi reaction has been studied at the Cooler Synchrotron COSY-Jülich, using the internal beam and ANKE facility. Total cross sections have been determined at three excess energies epsilon near the production threshold. The differential cross section closest to threshold at epsilon=18.5 MeV exhibits a clear S wave dominance as well as a noticeable effect due to the proton-proton final-state interaction. Taken together with data for ppomega production, a significant enhancement of the phi/omega ratio of a factor 8 is found compared to predictions based on the Okubo-Zweig-Iizuka rule.
Source PubMed, pmid16907232
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