[en] Eight separate experiments at CERN are discussed. Six use the 25 GeV Proton-Synchrotron

[en] We have made a careful analysis of the effect of statistical uncertainty in the form of the antineutron-nucleus potential on the value of the neutron-antineutron mixing time. Using a bias-free optical potential derived from fits to the (anti p,¹²C) scattering data at 47 MeV, together with the IMB and Kamiokande results for the lifetime of ¹⁶O, we set lower limits on the neutron-antineutron mixing time τ_nsub(anti n) of > 1.1x10⁸ s and 1.5x10⁸ s, respectively, both at the 90% confidence level. We adopt the theoretical approach of Dover, Gal and Richard to extract these limits from the ¹⁶O data. (orig.)

No abstract available

[en] The pion-nucleon backward scattering data at 3.5 GeV/c are fitted with two Regge-type models which were first used at 6 GeV/c: a good description of the data is obtained; however the parameters differ significantly from those at 6 GeV/c. A simultaneous fit at 3.5 and 6 GeV/c can be made with Nsub(α) and Nsub(γ) Regge amplitudes, if the non-Regge terms are fitted with separate sets of parameters at each energy. (Auth.)

[en] The polarization parameter in π^-p→K⁺Σ^- backward scattering has been measured at 3.5 GeV/c incident momentum, in the u-range -0.6< u<0.1 GeV². The apparatus consisted of a polarized target in a spectrometer magnet, counter hodoscopes for time-of-flight measurements, a larger water Cerenkov counter for kaon tagging, and wire spark chambers. After identification of the kaons, the reaction was selected by a missing-mass technique. An isospin analysis has been carried out to separate the contributions of the various isospin exchange amplitudes in the u-channel. (Auth.)

No abstract available

No abstract available

No abstract available

[en] The polarization parameter has been measured for π^-p elastic scattering in the backward region at 3.5 GeV/c incident momentum. The experimental set-up consisted of a polarized target in a spectrometer magnet, hodoscopes and wire spark chambers. Data are presented for the range -0.95< u<=-0.19 GeV². An isospin analysis has been carried out to separate the Isub(u)=1/2 and Isub(u)=3/2 contributions. (Auth.)

[en] The authors describe a method which provides the coordinates along the trajectory of a particle traversing an axially symmetric magnetic field. The momentum of the particle is evaluated with a simple algorithm when the detectors which measure the coordinates of the particle trajectory are of cylindrical shape. (Auth.)