2004/07/06 by A. Sibirtsev, J. Haidenbauer, S. Krewald +1 · 26 citations
Physics and Astronomy · #Atomic physics #Baryon #High-Energy Particle Collisions Research #Meson #Nuclear physics #Parity (physics) #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #Spectral line #hep-ex #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1140/epja/i2004-10094-8
published in The European Physical Journal A 23(3), 491-499 (Springer Science+Business Media) · 9 pages, 7 figures
arxiv created 2004/07/06 · openalex publication_date 2005/01/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The reaction K+Xe->K0pX is investigated in a meson-exchange model including rescattering of the secondary protons with the aim to analyze the evidence for the Theta+(1540) resonance reported by the DIANA collaboration. We confirm that the kinematical cuts introduced by the DIANA collaboration efficiently suppress the background to the K+n->K0p reaction which may contribute to the Theta+(1540) production. We find that these kinematical cuts do not produce a narrow structure in the K0p effective mass spectra near 1540 MeV. We study the effect of a narrow Theta+ resonance of both positive and negative parity in comparison with the DIANA data. We show that the K+Xe->K0pX calculations without Theta+ contribution as well as the results obtained with a Theta+ width of 1 MeV are in comparably good agreement with the DIANA results. More dedicated experiments are called for to establish this exotic baryon resonance.