https://doi.org/10.1140/epja/i2005-10089-y
Original Article
The K-α scattering length and the reaction dd↦αK+K-
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
Received:
1
April
2005
Accepted:
10
June
2005
Published online:
23
June
2005
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 E R = - 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.
PACS: 25.10.+s Nuclear reactions involving few-nucleon systems – / 13.75.-n Hadron-induced low- and intermediate-energy reactions and scattering (energy ⩽ 10 GeV) –
© Società Italiana di Fisica and Springer-Verlag, 2005