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Bellemann, F. [Author]; Berg, A. [Author]; Kilian, K. [Author]; Kozela, A. [Author]; Machner, H. [Author]; Magiera, A. [Author]; Munkel, J. [Author]; von Neumann-Cosel, P. [Author]; von Rossen, P. [Author]; Schnitker, H. [Author]; Scho, K. [Author]; Smyrski, J. [Author]; Bisplinghoff, J. [Author]; Tölle, R. [Author]; Wilkin, C. [Author]; Bohlscheid, G. [Author]; Ernst, J. [Author]; Henrich, C. [Author]; Hinterberger, F. [Author]; Ibald, R. [Author]; Jahn, R. [Author]; Joosten, R. [Author]

Experimental study of the pd-->3He K+K- and pd-->3He phi reactions close to threshold

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  • Media type: E-Article
  • Title: Experimental study of the pd-->3He K+K- and pd-->3He phi reactions close to threshold
  • Contributor: Bellemann, F. [Author]; Berg, A. [Author]; Kilian, K. [Author]; Kozela, A. [Author]; Machner, H. [Author]; Magiera, A. [Author]; Munkel, J. [Author]; von Neumann-Cosel, P. [Author]; von Rossen, P. [Author]; Schnitker, H. [Author]; Scho, K. [Author]; Smyrski, J. [Author]; Bisplinghoff, J. [Author]; Tölle, R. [Author]; Wilkin, C. [Author]; Bohlscheid, G. [Author]; Ernst, J. [Author]; Henrich, C. [Author]; Hinterberger, F. [Author]; Ibald, R. [Author]; Jahn, R. [Author]; Joosten, R. [Author]
  • imprint: Inst., 2007
  • Published in: Physical review / C 75, 015204 (2007). doi:10.1103/PhysRevC.75.015204
  • Language: English
  • DOI: https://doi.org/10.1103/PhysRevC.75.015204
  • ISSN: 0556-2813
  • Keywords: Phi(1020): hadroproduction ; channel cross section: energy dependence ; threshold ; Juelich COSY PS ; Phi(1020) --> K+ K- ; Phi(1020): hadronic decay ; angular distribution: (K+ K) ; K: pair production ; p deuteron --> helium-3 K+ K- ; p deuteron --> helium-3 Phi(1020) ; Phi(1020): polarization ; p deuteron: exclusive reaction ; experimental results ; f0(980)
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  • Description: Two-kaon production in proton-deuteron collisions has been studied at three energies close to threshold using a calibrated magnetic spectrograph to measure the final He-3 and a vertex detector to measure the K+K- pair. Differential and total cross sections are presented for the production of phi-mesons, decaying through phi -> K+K-, as well as for prompt K+K- production. The prompt production seems to follow phase space in both its differential distributions and in its energy dependence. The amplitude for the pd -> He-3 phi reaction varies little for excess energies below 22 MeV and the value is consistent with that obtained from a threshold measurement. The angular distribution of the K+K- decay pair shows that near threshold the phi-mesons are dominantly produced with polarization m=0 along the initial proton direction. No conclusive evidence for f(0)(980) production is found in the data.
  • Access State: Open Access