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The K^- αscattering length and the reaction dd \to αK^+ K^-

V. Yu. Grishina·L. A. Kondratyuk·A. Sibirtsev·M. Büscher·S. Krewald·U. -G. Meißner·F. P. Sassen
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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 E_R = -2 ... -7 MeV and a width Γ_R = 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 \to 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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V. Yu. Grishina, L. A. Kondratyuk, A. Sibirtsev, M. Büscher, S. Krewald, U. -G. Meißner, F. P. Sassen. 2005-03-30. The K^- αscattering length and the reaction dd \to αK^+ K^-. https://doi.org/10.1140/epja%2Fi2005-10089-y

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