Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-09-21
Physics
Nuclear Physics
Nuclear Theory
27 pages, 6 figures, Final-state interaction is taken into account. All results agree well with the experimental data
Scientific paper
The cross sections for the reactions pp -> p Lambda^0K^+ and pn -> n Lambda^0K^+ are calculated near threshold of the final states. The theoretical ratio of the cross sections R = sigma(pn -> n Lambda^0K^+)/ sigma(pp ->p\Lambda^0K^+) = 3 shows the enhancement of the pn interaction with respect to the pp interaction near threshold of the strangeness production N Lambda^0K^+. Such an enhancement is caused by the contribution of the np interaction in the isospin-singlet state, which is stronger than the $pn$ interaction in the isospin-triplet state. For the confirmation of this result we calculate the cross sections for the reactions pp -> pp pi^0, pi^0 p -> Lambda^0 K^+ and pi^-p -> Lambda^0 K^0 near threshold of the final states. The theoretical cross sections agree well with the experimental data.
Berdnikov Ya. A.
Faber Manfried
Ivanov Andrei N.
Ivanova V. A.
Marton Johann
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