Decays of Baryon Resonances into K Lambda, K^+ Sigma^0 and K^0 Sigma^+

Details Decays of Baryon Resonances into K Lambda, K^+ Sigma^0 and K^0 Sigma^+ Decays of Baryon Resonances into K Lambda, K^+ Sigma^0 and K^0 Sigma^+

2005-06-06

arxiv.org/abs/hep-ex/0506011v1

Eur.Phys.J. A25 (2005) 441-453

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, 16 figures

Scientific paper

10.1140/epja/i2005-10121-4

Cross sections, beam asymmetries, and recoil polarisations for the reactions gamma p to K^+ Lambda ; gamma to K^+ Sigma^0, and gamma p to K^0 Sigma^+ 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 pi and eta photoproduction reveals evidence for new baryon resonances in this energy region. A new P_{11} 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 D_{13} states at 1870 and 2170 MeV.

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