Journal Article

PreJuSER-52234

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Near-Threshold Production Phi Mesons in pp Collisions

Hartmann, M.FZJ* ; Maeda, Y.FZJ* ; Keshelashvili, I.FZJ* ; Koch, H. R.FZJ* ; Mikirtytchiants, S. ; Barsov, S. ; Borgs, W.FZJ* ; Büscher, M.FZJ* ; Dimitrov, V. I. ; Dymov, S. ; Hejny, V.FZJ* ; Kleber, V. ; Koptev, V. ; Kulessa, P.FZJ* ; Mersmann, T. ; Merzliakov, S. ; Mussgiller, A.FZJ* ; Nekipelov, M.FZJ* ; Nioradze, M. ; Ohm, H.FZJ* ; Pysz, K.FZJ* ; Schleichert, R.FZJ* ; Stein, H. J.FZJ* ; Ströher, H.FZJ* ; Watzlawik, K.-H.FZJ* ; Wüstner, P.FZJ*

2006
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1638  doi:10.1103/PhysRevLett.96.242301

Abstract: The pp -> pp phi reaction has been studied at the Cooler Synchrotron COSY-Julich, 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 pp omega 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.

Keyword(s): p p: inelastic scattering ; Phi(1020): hadroproduction ; threshold ; mass spectrum: (K+ K-) ; channel cross section: energy dependence ; differential cross section: momentum dependence ; angular distribution ; amplitude analysis: partial wave ; p p: final-state interaction ; yield: (Phi(1020) omega(783)) ; Iizuka-Okubo-Zweig rule ; magnetic spectrometer: experimental results ; Juelich COSY PS ; p p --> Phi(1020) 2p

Note: Record converted from VDB: 12.11.2012; 4 Pages, 3 Figures, 1 Table, submitted to Phys. Rev. Lett

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Contributing Institute(s):

1. Institut 2 (Experimentelle Kernphysik II) (IKP-E-2)
2. Jülich-Aachen Research Alliance - Simulation Sciences (JARA-SIM)

Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2006
Notes: This version is available at the following Publisher URL: http://prl.aps.org

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