Frankfurt 2014 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 46: Poster
HK 46.4: Poster
Thursday, March 20, 2014, 16:00–18:00, HZ Poster
ΣN cusp effect and angular distributions in the the CMS frame in the p→p → pK+Λ reaction — •Sedigheh Jowzaee for the COSY-TOF collaboration — IKP-1, Forschungszentrum Jülich, Germany — Jagiellonian University, Krakow, Poland
The p→p → pK+Λ → pK+pπ− reaction has been measured with the COSY-TOF spectrometer with a polarized beam at a momentum of 2.95 GeV/c. Due to the full phase space covered by the COSY-TOF experiment, the Dalitz plot can be analyzed to study the details of the reaction mechanism. The Dalitz plot distribution reveals an influence of pΛ final state interaction (FSI), N∗ resonances and cusp effects at the Σ0p threshold as an enhancement in the pΛ subsystem. The cusp effects is more pronounced than measured at a beam momentum of 2.7 GeV/c. Moreover, the cusp shape due to the interference with N∗ resonances is studied in different regions of the KΛ subsystem. The angular distribution of products in the CMS are also studied to determine the coefficients of Legendre polynomials by fitting to angular distribution of the reaction. The preliminary results of this analysis will be shown in this presentation.