The K- αscattering length and the reaction dd αK+ K-
V. Yu. Grishina, L. A. Kondratyuk, A. Sibirtsev, M. Büscher, S. Krewald, U. -G. Meißner, F. P. Sassen
Abstract
We present predictions for the the K- αscattering length obtained within the framework of the multiple scattering approach. Evaluating the pole position of the K- αscattering amplitude within the zero range approximation, we find a loosely bound K- αstate with a binding energy of ER = -2 ... -7 MeV and a width ΓR = 11 ... 18 MeV. We propose to measure the K- αscattering length through the final state interaction between the αand K- meson produced in the reaction dd αK+ K-. It is found that the K-αinvariant mass distribution from this reaction at energies near the threshold provides a new tool to determine the s-wave K- αscattering length.
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