On strangeness production in the reactions pp -> p Lambda⁰ K⁺ and pn -> n Lambda⁰ K⁺ near threshold

2005/09/21 by A. N. Ivanov, Y. Berdnikov, Ivanov, A. N. +9
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions

paper · doi:10.48550/arxiv.nucl-th/0509055

openalex publication_date 2005/09/21 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

The cross sections for the reactions pp -> p Lambda⁰K⁺ and pn -> n Lambda⁰K⁺ are calculated near threshold of the final states. The theoretical ratio of the cross sections R = sigma(pn -> n Lambda⁰K⁺)/ sigma(pp ->pΛ⁰K⁺) = 3 shows the enhancement of the pn interaction with respect to the pp interaction near threshold of the strangeness production N Lambda⁰K⁺. 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 pi⁰, pi⁰ p -> Lambda⁰ K⁺ and pi^-p -> Lambda⁰ K⁰ near threshold of the final states. The theoretical cross sections agree well with the experimental data.

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