Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 67: Hadron Structure and Spectroscopy 12
HK 67.6: Vortrag
Donnerstag, 26. März 2015, 18:30–18:45, T/SR25
Study of 2.13GeV Cusp in p + p → p + K+ + Λ with Partial wave Analysis using Flatté distribution. — •S. Lu1, R. Münzer1, E. Epple1, L. Fabbietti1, J. Ritman2, E. Roderburg2, F. Hauenstein2, and Hades and FOPI Collaboration2 — 1E12 Physik Department, Excellenz Cluster Universe - Technische Universität München — 2FZ Jülich
In the last years, the analysis of the reaction p + p → p + K+ + Λ has been carried out by the FOPI and Hades Collaboration in the search for Kaonic Cluster ppK−. This analysis has shown that a sufficient description of the p + p → p + K+ + Λ is quite challanging due to the presence of resonances N* and interference, which requires Partial wave Analysis. In a new analysis campaign a combined analysis of several additional data sets from DISTO and COSY-TOF can be analysed. A pronounced narrow structure is observed in its projection on the pΛ-invariant mass. This peak structure, which appears around the ΣN threshold, has a strongly asymmetric structure and is interpreted a ΣN cusp effect. To get a more precise physical interpretation of the data, the Flatté parameterization, which also takes the influence, is used. The influences of the coupling strength of Λp and Σp are taken into account. In this talk, several results from partial wave analysis of cusp structure based on Flatté parameteration will be presented. *supported by the DFG Project FA 898/2-1