https://doi.org/10.1140/epja/i2005-10121-4
Original Article
Decays of baryon resonances into ΛK+, ΣK+ and Σ+K0
1
Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
2
Petersburg Nuclear Physics Institute, Gatchina, Russia
3
Physikalisches Institut, Universität Gießen, Germany
* e-mail: klempt@hiskp.uni-bonn.de
Received:
13
May
2005
Accepted:
11
July
2005
Published online:
7
October
2005
Cross-sections, beam asymmetries, and recoil polarisations for the reactions γp → K +Λ;γp → K +Σ0, and γp → K 0Σ+ 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 1875 and, optimistically, at 2170 MeV.
PACS: 11.80.Et Partial-wave analysis – / 13.30.-a Decays of baryons – / 13.60.Le Meson production – / 14.20.Gk Baryon resonances with S = 0 –
© Società Italiana di Fisica and Springer-Verlag, 2005