J. Prevost

K−p cross sections from440 to 800 MeV/c

Abstract K − p reactions have been studied at 19 different momenta between 436 and793 MeV/ c . This interval corresponds to a mass of theK¯N system from 1535 to 1695 MeV. About 400 000 photographs were taken in the 81 cm Saclay hydrogen bubble chamber exposed to a separated K − beam at the CERN proton-synchrotron. A total of about 100 000 events were analysed, from which partial and differential cross sections were determined. Polarizations were obtained for the two-body reactions where the decay of the Λ or Σ hyperon allowed their measurement. Data for all the channels are presented here.

A fit of baryon decay rates within SU(3)

Abstract A test of the consistency between observed resonant amplitudes or decay rates for baryon resonances with SU(3) predictions has been made. Coupling constants describing the decays are determined and predictions are given for decays into stable baryons and mesons.

The reactions K−p → K−p and K−p → Kon between 600 and 1200 MeV/c

Data on K−p → K−p, K− → Kon and on the K−p total cross section between 600 and 1200 MeV/c are analysed in terms of resonant and non-resonant partial-wave amplitudes.

Energy-independent partial-wave analysis of KN → Λπ between 600 and 1200 MeV/c

Abstract The reactions K−p → ΛπO and K−n → Λπ− in the centre-of-mass energy range from ≈1.6 to ≈1.9 GeV have been interpreted in terms of an energy-independent partial-wave analysis. Solutions are presented and the possible existence of new resonant states is discussed.

New experimental results on the reactions K−p → KN and K−p → Σπ and a partial-wave analysis between 430 and 800 MeV/c

The reactions K−p → K−p, K0n and K−p → Σ+π−, Σ0π0, Σ−π+ have been studied in the c.m. energy range 1530 – 1700 MeV; new experimental data are presented and results of an energy-dependent partial-wave analysis are discussed.

Partial-wave analysis of the reaction K−p → Σπ between 0.6 and 1.0 GeV/c

Abstract Data on the reactions K−p → Σπ are analyzed in terms of partial-wave amplitudes. Results are presented on resonance formation in the mass region 1.6 to 1.8 GeV.

A study of the reactions KN→Σ(1385)π between 0.6 and 1.2 GeV/c☆

An energy-dependent partial-wave analysis of the reaction KN→Σ(1385)π has been performed in the energy region lying between 1.65 and 1.85 GeV. The resonant amplitudes of seven well known Y∗ resonances have been determined, and used to compute the corresponding (8) ⊗ (10) SU (3) coupling constants.

A study of the reactions anti-k n ---> sigma(1385) pi between 0.6 and 1.2 gev/c

An energy-dependent partial-wave analysis of the reaction KN→Σ(1385)π has been performed in the energy region lying between 1.65 and 1.85 GeV. The resonant amplitudes of seven well known Y∗ resonances have been determined, and used to compute the corresponding (8) ⊗ (10) SU (3) coupling constants.

K−p cross sections between 1.1 and 1.4 GeV/c

Abstract K−p reactions have been studied at 13 different incident momenta between 1138 and 1434 MeV/c. This interval corresponds to a mass of the K−p system varying from 1858 to 1993 MeV. About 300 000 photographs were taken in the 81 cm Saclay hydrogen bubble chamber exposed to a separated K− beam at the CERN proton-synchrotron. A total of about 44 000 events were analyzed, from which partial and differential cross sections were determined. Polarizations were obtained for the two-body reactions where the decay of the Λ or Σ hyperon allowed their measurement. Data for the two-body channels are presented here as well as for the main quasi-two-body reactions.

Study of the reaction K−N → Σππ between 600 and 1200 MeV/c

Abstract The total cross-sections for K − N collisions leading to Σππ final states are measured between 0.6 and 1.2 GeV/ c and the results are analysed in terms of the isospin of the Σππ and Σπ systems. An upper limit for the decay Σ (1660) → Λ (1405) π is given.