Near threshold Λ and Σ[sup 0] production in pp collisions

Gasparian, A.; Haidenbauer, J.; Hanhart, C.; Kondratyuk, L.; Speth, J.
June 2000
AIP Conference Proceedings;2000, Vol. 512 Issue 1, p120
Academic Journal
The reactions pp→pΛK[sup +] and pp→pΣ[sup 0]K[sup +] are studied near their thresholds. The strangeness production process is described by the π- and K exchange mechanisms. Effects from the final state interaction in the hyperon-nucleon system are taken into account rigorously. It is shown that the experimentally observed strong suppression of Σ[sup 0] production compared to Λ production can be explained by a destructive interference between π and K exchange in the reaction pp→pΣ[sup 0]K[sup +]. © 2000 American Institute of Physics.


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