Reactions pd→3He η and pd→3He π+π- near the η threshold

B. Mayer, A. Boudard, B. Fabbro, M. Garçon, C. Kerboul, J. Poitou, F. Wellers, W. W. Jacobs, J. Saudinos, E. Tomasi-Gustafsson, J. P. Mouly, R. S. Kessler, B. M.K. Nefkens, B. Tippens, A. Van Der Schaaf, R. Abegg, W. T.H. Van Oers, W. Briscoe, A. Petrov, A. Moalem

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157 Scopus citations

Abstract

The reaction pd→3He η has been studied with the SPES2 spectrometer, for proton energies between 0.2 MeV and 11 MeV above threshold. The total cross section rises from 0.25 to 0.40 μb in this region. The observed energy dependence can be attributed to the strong final state interaction. The angular distribution is nearly isotropic, consistent with S wave production. A measurement of the pd→3He π+π- cross section in the threshold region is also presented. The setup, which is capable of producing 105 tagged η/s with only a few percent background, is used to investigate rare η decays.

Original languageEnglish
Pages (from-to)2068-2074
Number of pages7
JournalPhysical Review C - Nuclear Physics
Volume53
Issue number5
DOIs
StatePublished - 1 Jan 1996

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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