Journal Article

PreJuSER-55478

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Hyperon production in the channel pp to Lambda K+p near the reaction threshold

Abdel-Samad, S.FZJ* ; Bilger, R. ; Böhm, A. ; Brinkmann, K. ; Clement, H. ; Dshemuchadse, S. ; Erhardt, A. ; Eyrich, W. ; Fanara, C. ; Filippi, A. ; Freiesleben, H. ; Fritsch, M. ; Geyer, J. ; Hauffe, J. ; Hassan, J. ; Herrmann, P. ; Hesselbarth, D.FZJ* ; Jakob, B. ; Kilian, K.FZJ* ; Koch, H. ; Kress, J. ; Kuhlmann, E.FZJ* ; Marcello, S. ; Marwinski, S.FZJ* ; Metzger, A. ; Michel, P. ; Möller, K. ; Morsch, H. P.FZJ* ; Naumann, L. ; Roderburg, E.FZJ* ; Schamlott, A. ; Schönmeier, P. ; Schröder, W. ; Schulte-Wissermann, M. ; Steinke, M. ; Stinzing, F. ; Sun, G. Y. ; Wächter, J. ; Wagner, G. J. ; Wagner, M. ; Wilms, A. ; Wirth, S. ; Zielinski, U.

2006
North-Holland Publ. Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.physletb.2005.09.086

Abstract: Hyperon production in the threshold region was studied in the reaction pp -> K(+)Lambda p using the time-of-flight spectrometer COSY-TOF. Exclusive data, covering the full phase-space, were taken at three different beam momenta P-beam = 2.59, 2.68 and 2.85 GeV/c (corresponding to excess energies of epsilon = 85, 115 and 171 MeV). Total cross-sections were deduced to be 7.4 +/- 0.5 mu b, 8.6 +/- 0.6 mu b and 16.5 +/- 0.4 mu b, respectively. Differential observables including Dalitz plots were obtained. From the investigation of the Dalitz plot at Pbeam = 2.85 GeV/c a dominant contribution of the N* (1650)-resonance to the reaction mechanism was found. In addition the p Lambda-final-state interaction turned out to have a significant influence on the Dalitz plot distribution even 171 MeV above threshold. (c) 2005 Elsevier B.V. All rights reserved.

Keyword(s): p p: exclusive reaction ; Lambda: hadroproduction ; K+: associated production ; channel cross section: energy dependence ; Dalitz plot ; N(1650) ; p Lambda: final-state interaction ; spectrometer: experimental results ; Juelich COSY PS ; p p --> Lambda p K+ ; 2.59-2.85 GeV ; associated strangeness production (auto) ; total cross-section (auto) ; angular distribution (auto) ; Dalitz plot (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut 1 (Experimentelle Kernphysik I) (IKP-E-I)

Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2006

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