Strangeness Production Process $pp \to nK^ + Σ^ +$ within Resonance Model

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dc.creatorCao, Xu
dc.creatorLee, Xi-Guo
dc.creatorWang, Qing-Wu
dc.date2007-11-20
dc.date2008-04-04
dc.date.accessioned2026-07-07T11:13:18Z
dc.date.available2026-07-07T11:13:18Z
dc.descriptionWe explore production mechanism and final state interaction in the $pp \to nK^ + Σ^ +$ channel based on the inconsistent experimental data published respectively by COSY-11 and COSY-ANKE. The scattering parameter $a> 0$ for $nΣ^ +$ interaction is favored by large near-threshold cross section within a nonrelativistic parametrization investigation, and a strong $nΣ^ +$ interaction comparable to $pp$ interaction is also indicated. Based on this analysis we calculate the contribution from resonance $Δ^* (1920)$ through $π^ +$ exchange within resonance model, and the numerical result suggests a rather small near-threshold total cross section, which is consistent with the COSY-ANKE data. With an additional sub-threshold resonance $Δ^*(1620)$, the model gives a much better description to the rather large near-threshold total cross section published by COSY-11.
dc.description10pp + 4figs, published version
dc.identifierhttps://arxiv.org/abs/0711.3063
dc.identifierhttp://arxiv.org/abs/0711.3063
dc.identifierChin.Phys.Lett.25:888-891,2008
dc.identifierdoi:10.1088/0256-307X/25/3/023
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191672
dc.subjectNuclear Theory
dc.titleStrangeness Production Process $pp \to nK^ + Σ^ +$ within Resonance Model
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