Freiburg 1999 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 18: Theorie III
HK 18.4: Vortrag
Dienstag, 23. März 1999, 14:45–15:00, A
Influence of the hyperon-nucleon interaction on the assosiated strangeness production — •Achot Gasparian1,2, Johann Haidenbauer1, Christoph Hanhart1, Leonid Kondratyuk3, and Joseph Speth1 — 1Institute für Kernphisyk, Forschungszentrum Jülich, D-52425 Jülich — 2Moscow State Engineering Physics Institute(Technical University) 115409 Moscow,Kashirskoe s. 31 — 3Institute of Theoretical and Experimental Physics,Russia, Moscow,117258, B.Cheremushkinskaya 25
In a recent experiment the cross section ratio R=σpp→ pK+Λ/σpp→ pK+Σ0 was measured [1].
R turned out to be of the order of 30. A conversion of Σ→Λ via the hyperon-nucleon final state interraction
was suggested as a possible explanation.We discuss the influence of the hyperon-nucleon interaction on the
associated strangeness production. For the production operator a simple model is employed
whereas the FSI is included by means
of realistic Y-N interactions [2,3]
that allow to study the effects of channel coupling.
[1] S.Sewerin et al.,nucl-ex/9811004
[2] B.Holzenkamp et al., Nucl.Phys.A500, 485 (1989)
[3] P.M.M.Maessen et al., Phys. Rev.C40, 2226 (1989)