[en] We present an analysis of the K_s^oK_s^o system produced in the reaction π^-p→K_s^oK_s^o at 63 GeV based on ∼ 700 events in the kinematical region of |t|<0.5 GeV². We concentrate on masses between 1200 and 1600 MeV where a double maximum structure is observed. Performing an amplitude analysis in this mass interval we find that S, D_o and D₊ waves contribute to the mass spectrum at approximately equal strength. The peaks are attributed to spin 2 waves. However, we failed to explain them by interfering f(1270), A₂(1310) and f'(1520) resonances alone. While the first peak can be associated with f(1270) -A₂(1310) production, an additional tensor meson is needed with mass of ∼ 1410 MeV and a narrow width for a description of the second one. The analysis as well as the energy dependence deduced from some published K_s^oK_s^o mass spectra suggests this object to be dominantly produced by a natural parity exchange. Because the 2⁺⁺qq-bar nonet is already complete the nature of the new tensor meson is an open question. (author)

[en] In the experiment NA11 at the CERN SPS the MC68000 based FAMP system has been successfully implemented in a second stage trigger. It was used in a study of inclusive phi-meson production to select phi → K⁺K^- decays by determining the charged K-meson trajectories and calculating the K⁺K^- invariant mass. A trigger rate reduction by a factor of 25 and an increase in the number of recorded phi-decays per unit time by a factor of 8 has been achieved. (Auth.)

[en] In the experiment NA11 at the CERN SPS the MC68000 based FAMP system has been successfully implemented in a second stage trigger. It was used in a study of inclusive phi-meson production to select phi->K⁺K^- decays by determining the charged K-meson trajectories and calculating the K⁺K^- invariant mass. A trigger rate reduction by a factor of 25 and an increase in the number of recorded phi-decays per unit time by a factor of 8 has been achieved. (orig.)

[en] A narrow enhancement is observed in anti pp states produced inclusively in proton-proton interactions at 93 GeV. The mass 1940 +- 1 MeV is consistent with that of the S(1936). (orig.)

[en] Results are presented of an experiment studying inclusive -meson production off protons by hadrons of 93 and 63 GeV incident momentum. Evidence is found for an enhanced probability of observing additional strange particles when the final state contains a PHI meson. This supports the assumption that central production of mesons proceeds, for a significant part, by the OZI allowed fusion of strange quarks. (orig.)

[en] A sample of about 230000 events of the reaction π^-p → π⁺π^-n, measured with a magnetic forward spectrometer set up in an unseparated π^- beam with a momentum of 63 GeV/c at the SPS has been analysed in terms of one pion exchange. The elastic π⁺π^- cross section has been determined using an extrapolation to the pion pole in the mass range up to msub(π⁺π^-) = 4 GeV. The total π⁺π^- cross section is obtained via the optical theorem. (orig.)

[en] Nearly 200 000 example of the diffractive process K^-p → Ksub(-)πsub(-)πsub(+)p at 63 GeV have been obtained using a two magnet spectrometer equipped with cerenkov counters for secondary particle identification. In addition some 2 000 examples of the process K^-p → ωK^-p have been obtained. (orig.)

[en] The inclusive reactions h + p → PHI + X, (h = πsup(+-), Ksup(+-), psup(+-)), are studied for 0 approx. <= xsub(F) approx. <= 0.3 and psub(perpend. to) <= 1 GeV at 93 and 63 GeV incident momentum. Differential cross sections dsigma/dp²sub(perpend. to) and dsigma/dxsub(F) are presented and are compared with predictions of the naive parton model. (orig.)

[en] Total and differential cross-sections have been measured for the reactions π^-p → (π⁰,eta,eta')n. The results agree with those of two experiments carried out in the same energy range, apart from measurements at high /t/ for the charge-exchange reaction π^-p → π⁰n. The latter indicate a deviation from the prediction of a single Regge-pole model with linear trajectories at high incident momentum and high momentum transfer. (orig.)

[en] The Jsup(PC) = 2^-+ partial wave intensities and their large phase changes prove the resonant nature of the A₃ meson (mass approx. 1670 MeV, width approx. 210 Mev). The decay modes are f⁰π, rho⁰π, and epsilon⁰π. Evidence is found for a further 2^- enhancement. (orig.)