Study of the $K^{+}{K}^{-}$ final state interaction in proton-proton and electron-positron collisions

Abstract

The strength of the kaon--antikaon interaction is a crucial quantity for many physics topics. It is for example, an important parameter in the discussion on the nature of the scalar resonances $a_0(980)$ and $f_0(980)$, in particular for their interpretation as $K\bar{K}$ molecules. So far, one of the few possibilities to study this interaction is the kaon pair production in multi particle exit channels like $pp\to pp{K}^{+}{K}^{-}$. In this article we present the latest results of the $K^{+}{K}^{-}$ interaction preformed based on near threshold data gathered at the Cooler Synchrotron COSY. We discuss also shortly perspectives for a new measurement of the kaon--antikaon scattering length in the $e^{+}{e}^{-}$ collisions.

Comments: Proceedings of the Excited QCD 2013 Workshop, Bjelasnica Mountain, Sarajevo, February 3-9, 2013