Diploma Thesis

PreJuSER-1308

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Analysis of the differential cross sections for the reaction pp -> ppK+K- in view of the K+K- interaction

Silarski, M. (Corresponding author)FZJ*

2008
Forschungszentrum Jülich Gmbh Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/3143

Report No.: Juel-4278

Abstract: Measurement of the pp $\rightarrow$ppK$^{+}K^{-}$ reaction, performed with the experiment COSY-11 at the Cooler Synchrotron COSY, show a significant difference between the obtained excitation function and theoretical expectations including pp FSI. The discrepancy may be assigned to the influence of K$^{+}K^{-}$ or K$^{-}$p interaction. This interaction should manifest itself in the distributions as a function of the invariant masses or two particle subsystems. In particular in the analysis two generalizations of the Dalitz plot proposed by Goldhaber and Nyborg are used. The present Investigations are based on the experimental data determined by the COSY-11 collaboration from two measurements at excess energies of Q = 10 MeV and 28 MeV. The experimental distributions are compared to results of Monte Carlo simulations generated with various parameters of the K$^{+}K^{-}$ and K$^{-}$p interaction. The values of the K$^{+}K^{-}$ scattering length, extracted from two data sets for Q = 10 MeV and 28 MeV amount to: a$_{K^{+}K^{-}} = (11 \pm 8) + i(0\pm 6)$ fm for Q = 10 MeV, and a$_{K^{+}K^{-}} = (0.2 \pm 0.2) + i(0.0 \pm 0.5)$ fm for Q = 28 MeV. Due to the low statistics, the extracted values habe large unvertainties and are consistent with very low values of the real and imaginary part of the scattering length.

Note: Record converted from VDB: 12.11.2012
Note: Krakow, Univ., Dipl., 2008

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Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2008

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Database coverage:

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