Comparison of lambda and sigma (0) production near threshold in proton-proton collisions

Sewerin, S. H.; Budzanowski, A.; Lister, T.; Haidenbauer, J.; Stinzing, F.; Khoukaz, A.; Wyrwa, D.; Kilian, K.; Grzonka, D.; Quentmeier, C.; Santo, R.; Balewski, J. T.; Jochmann, M.; Hanhart, C.; Oelert, W.; Wilkin, C.; Wüstner, P.; Sefzick, T.; Köhler, M.; Eyrich, W.; Wolke, M.; Hofmann, M.; Pellmann, I.; Fritsch, M.; Seddik, U.; Schepers, G.; Moskal, P.; Jarczyk, L.; Strzalkowski, A.; Goodman, C.

doi:10.1103/PhysRevLett.83.682

Journal Article

Comparison of lambda and sigma (0) production near threshold in proton-proton collisions

Sewerin, S. H.FZJ* ; Schepers, G.FZJ* ; Balewski, J. T. ; Budzanowski, A. ; Eyrich, W. ; Fritsch, M. ; Goodman, C. ; Grzonka, D.FZJ* ; Haidenbauer, J.FZJ* ; Hanhart, C.FZJ* ; Hofmann, M.FZJ* ; Jarczyk, L. ; Jochmann, M.FZJ* ; Khoukaz, A. ; Kilian, K.FZJ* ; Köhler, M.FZJ* ; Lister, T. ; Moskal, P. ; Oelert, W.FZJ* ; Pellmann, I.FZJ* ; Quentmeier, C. ; Santo, R. ; Seddik, U. ; Sefzick, T.FZJ* ; Stinzing, F. ; Strzalkowski, A. ; Wilkin, C. ; Wolke, M.FZJ* ; Wüstner, P.FZJ* ; Wyrwa, D.

1999
APS College Park, Md.

Physical review letters 83, 682 (1999) [10.1103/PhysRevLett.83.682]

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Please use a persistent id in citations: http://hdl.handle.net/2128/7646 doi:10.1103/PhysRevLett.83.682

Abstract: Threshold measurements of the associated strangeness production reactions pp --> pK(+)Lambda and pp --> pK(+)Sigma(0) are presented. The most remarkable feature of the data is that at the same excess energy the total cross section for the Sigma(0) production appears to be about a factor of 28(-9)(+6) smaller than for the Lambda particle. It is concluded that strong Sigma(0)p final state interactions, and in particular the Sigma N --> Lambda p conversion reaction, are the likely cause of the depletion in the Sigma signal. This hypothesis is in line with other experimental evidence in the literature.

Keyword(s): J

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