The K-α scattering length and the reaction dd↦αK+K- |
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| Authors: | V. Yu. Grishina L. A. Kondratyuk A. Sibirtsev M. Büscher S. Krewald U. -G. Meißner F. P. Sassen |
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| Affiliation: | (1) Institute for Nuclear Research, 60th October Anniversary Prospect 7A, 117312 Moscow, Russia;(2) Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117259 Moscow, Russia;(3) Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn, Nußallee 14-16, D-53115 Bonn, Germany;(4) Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany |
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| Abstract: | We present predictions for 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 ΓR = 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↦αK+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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| Keywords: | 25.10.+s Nuclear reactions involving few-nucleon systems 13.75.-n Hadron-induced low- and intermediate-energy reactions and scattering (energy ⩽ 10 GeV) |
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