Journal Article

PreJuSER-53505

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Precision measurement of the quasi-free pn -> d phi reaction close to threshold

Maeda, Y.FZJ* ; Hartmann, M.FZJ* ; Keshelashvili, I.FZJ* ; Barsov, S. ; Büscher, M.FZJ* ; Dzyuba, A. ; Dymov, S. ; Hejny, V.FZJ* ; Kacharava, A. ; Kleber, V. ; Koch, H. R.FZJ* ; Koptev, V. ; Kulessa, P. ; Mersmann, T. ; Mikirtytchiants, S. ; Mussgiller, A.FZJ* ; Nekipelov, M.FZJ* ; Ohm, H.FZJ* ; Schleichert, R.FZJ* ; Stein, H. J.FZJ* ; Ströher, H.FZJ* ; Valdau, Y.FZJ* ; Watzlawik, K.-H.FZJ* ; Wilkin, C. ; Wüstner, P.FZJ*

2006
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1641  doi:10.1103/PhysRevLett.97.142301

Abstract: The quasifree pn -> d phi reaction has been studied at the Cooler Synchrotron COSY-Julich, using the internal proton beam incident on a deuterium cluster-jet target and detecting a fast deuteron in coincidence with the K+K- decay of the phi meson. The energy dependence of the total and differential cross sections are extracted for excess energies up to 80 MeV by determining the Fermi momentum of the target neutron on an event-by-event basis. Though these cross sections are consistent with s-wave production, the kaon angular distributions show the presence of p waves at quite a low energy. Production on the neutron is found to be stronger than on the proton but not by as much as for the eta meson.

Keyword(s): p deuteron: nuclear reaction ; p: spectator ; p n: exclusive reaction ; Phi(1020): hadroproduction ; Phi(1020): hadronic decay ; threshold ; mass spectrum: (K+ K-) ; angular distribution ; channel cross section: energy dependence ; Phi(1020): polarization ; amplitude analysis: partial wave ; magnetic spectrometer: experimental results ; Juelich COSY PS ; p n --> deuteron Phi(1020) ; 2.65 GeV

Note: Record converted from VDB: 12.11.2012; 4 Pages, 3 Figures, version 2, resubmitted 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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