K-Λ and K-Σ photo-production in a coupled channels framework

Usov, A.; Scholten, Olaf

doi:10.1063/1.1932946

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2005

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“…Other groups [28,29] find evidence for a third S 11 resonance which has been suggested to explain an anomaly in the η photoproduction cross section [30]. Usov and Scholten [31] use a coupled channel frame derived from an effective Lagrangian to fit CLAS and SAPHIR data on ΛK + and ΣK. Eight N * and 3 ∆ * resonances are introduced, among them two P 11 resonances at 1520 and 1850 MeV and a ∆(1855)P 33 .…”

Section: Introductionmentioning

confidence: 99%

Decays of baryon resonances into ΛK+, ΣK+ and Σ+K0

et al. 2005

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Abstract. Cross sections, beam asymmetries, and recoil polarisations for the reactions γp → K + Λ; γp → K + Σ 0 , and γp → K 0 Σ + have been measured by the SAPHIR, CLAS, and LEPS collaborations with high statistics and good angular coverage for centre-of-mass energies between 1.6 and 2.3 GeV. The combined analysis of these data with data from π and η photoproduction reveals evidence for new baryon resonances in this energy region. A new P11 state with mass 1840 MeV and width 140 MeV was observed contributing to most of the fitted reactions. The data demand the presence of two D13 states at 1870 and 2170 MeV.

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Section: Introductionmentioning

confidence: 99%