https://doi.org/10.1140/epja/i2004-10207-5
Original Article
Spin and isospin effects in the NN → NKΛ reaction near threshold
1
Department of Radiation Sciences, Box 535, S-751 21, Uppsala, Sweden
2
Department of Physics & Astronomy, UCL, WC1E 6BT, London, UK
* e-mail: cw@hep.ucl.ac.uk
Received:
5
November
2004
Accepted:
5
April
2005
Published online:
20
May
2005
The spin and isospin structure of the amplitudes and observables for K +Λ production in nucleon-nucleon collisions in the near-threshold region is analysed. Five experiments are required in order to isolate the amplitudes, up to an overall phase and two discrete ambiguities, in a model-independent way. It is shown that, with reasonable values for the relative strengths of the π and ρ terms in a meson-exchange model, one expects production on the neutron to be significantly stronger than that on the proton. Negative values of the spin-transfer coefficient DNN are also predicted due to π-ρ interference.
PACS: 13.60.Le Meson production – / 14.40.Aq π, K, and η mesons – / 13.75.Ev Hyperon-nucleon interactions – / 13.88.+e Polarization in interactions and scattering –
© Società Italiana di Fisica and Springer-Verlag, 2005
