The K- α scattering length and the reaction dd α K+ K-
Abstract
We present predictions for the the K- α scattering length obtained within the framework of the multiple scattering approach. Evaluating the pole position of the K- α scattering amplitude within the zero range approximation, we find a loosely bound K- α state with a binding energy of ER = -2 ... -7 MeV and a width R = 11 ... 18 MeV. We propose to measure the K- α scattering length through the final state interaction between the α and K- meson produced in the reaction dd α K+ K-. It is found that the K-α invariant mass distribution from this reaction at energies near the threshold provides a new tool to determine the s-wave K- α scattering length.
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