TY  - JOUR
AU  - Abd El-Samad, S.
AU  - Borodina, E.
AU  - Brinkmann, K. -Th.
AU  - Clement, H.
AU  - Doroshkevich, E.
AU  - Dzhygadlo, R.
AU  - Ehrhardt, K.
AU  - Erhardt, A.
AU  - Eyrich, W.
AU  - Freiesleben, H.
AU  - Gast, W.
AU  - Gillitzer, A.
AU  - Grzonka, D.
AU  - Hanhart, C.
AU  - Hauenstein, F.
AU  - Klaja, P.
AU  - Kilian, K.
AU  - Krapp, M.
AU  - Ritman, J.
AU  - Roderburg, E.
AU  - Röder, M.
AU  - Schulte-Wissermann, M.
AU  - Schroeder, W.
AU  - Sefzick, T.
AU  - Wagner, G. J.
AU  - Wintz, P.
AU  - Wüstner, P.
TI  - On the ΣN cusp in the pp → pK+Λ reaction
JO  - The European physical journal / A
VL  - 49
IS  - 3
SN  - 1434-601X
CY  - Berlin
PB  - Springer
M1  - FZJ-2013-05110
SP  - 41
PY  - 2013
AB  - 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/
KW  - p Lambda: final-state interaction (INSPIRE)
KW  - angular distribution (INSPIRE)
KW  - nucleon resonance (INSPIRE)
KW  - nucleon Sigma: cusp effect (INSPIRE)
KW  - Dalitz plot (INSPIRE)
KW  - asymmetry (INSPIRE)
KW  - COSY-TOF (INSPIRE)
KW  - p p: exclusive reaction (INSPIRE)
KW  - Lambda: hadroproduction (INSPIRE)
KW  - K+: associated production (INSPIRE)
KW  - channel cross section: measured (INSPIRE)
KW  - experimental results (INSPIRE)
KW  - Juelich COSY PS (INSPIRE)
KW  - p p --> Lambda p K+ (INSPIRE)
KW  - 2.28 GeV-kin (INSPIRE)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000317855000013
DO  - DOI:10.1140/epja/i2013-13041-8
UR  - https://juser.fz-juelich.de/record/139102
ER  -