%0 Journal Article
%A Abd El-Samad, S.
%A Borodina, E.
%A Brinkmann, K. -Th.
%A Clement, H.
%A Doroshkevich, E.
%A Dzhygadlo, R.
%A Ehrhardt, K.
%A Erhardt, A.
%A Eyrich, W.
%A Freiesleben, H.
%A Gast, W.
%A Gillitzer, A.
%A Grzonka, D.
%A Hanhart, C.
%A Hauenstein, F.
%A Klaja, P.
%A Kilian, K.
%A Krapp, M.
%A Ritman, J.
%A Roderburg, E.
%A Röder, M.
%A Schulte-Wissermann, M.
%A Schroeder, W.
%A Sefzick, T.
%A Wagner, G. J.
%A Wintz, P.
%A Wüstner, P.
%T On the ΣN cusp in the pp → pK+Λ reaction
%J The European physical journal / A
%V 49
%N 3
%@ 1434-601X
%C Berlin
%I Springer
%M FZJ-2013-05110
%P 41
%D 2013
%X Measurements of the pp → pK (+) Λ reaction at T ( )p( ) = 2.28 GeV have been carried out at COSY-TOF. In addition to the Λp FSI and N (*) resonance excitation effects a pronounced narrow structure is observed in the Dalitz plot and in its projection on the pΛ invariant mass. The strongly asymmetric structure appears at the pp → NK (+) Σ threshold and is interpreted as the ΣN cusp effect. The observed width of about 20 MeV/c (2) is substantially broader than anticipated from previous measurements as well as theoretical predictions. Angular distributions of this cusp structure are shown to be dissimilar to those in the residual pK (+) Λ channel, but similar to those observed in the pK (+) Σ (0) channel. PDF = http://www.springerlink.com/
%K p Lambda: final-state interaction (INSPIRE)
%K angular distribution (INSPIRE)
%K nucleon resonance (INSPIRE)
%K nucleon Sigma: cusp effect (INSPIRE)
%K Dalitz plot (INSPIRE)
%K asymmetry (INSPIRE)
%K COSY-TOF (INSPIRE)
%K p p: exclusive reaction (INSPIRE)
%K Lambda: hadroproduction (INSPIRE)
%K K+: associated production (INSPIRE)
%K channel cross section: measured (INSPIRE)
%K experimental results (INSPIRE)
%K Juelich COSY PS (INSPIRE)
%K p p --> Lambda p K+ (INSPIRE)
%K 2.28 GeV-kin (INSPIRE)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000317855000013
%R 10.1140/epja/i2013-13041-8
%U https://juser.fz-juelich.de/record/139102