0000000000161531

AUTHOR

G. Wälder

showing 2 related works from this author

Spectra and correlations of Λ andΛ¯produced in 340-GeV/cΣ−+Cand 260-GeV/cn+Cinteractions

2002

We have measured the production of strange baryons and antibaryons in 340-GeV/c Sigma /sup -/+C and 260-GeV/c n+C interactions. The single x/sub F/ distributions show the expected leading particle effect, and the single p/sub t//sup 2/ distributions show a distinct nonthermal behavior. The x/sub F/ distributions of Lambda - Lambda pairs indicate two different phase space distributions for the two coincident baryons. On the other hand two Lambda 's show identical distributions. Momentum conservation during the formation process may represent a significant source for the observed behavior.

PhysicsParticle systemNuclear and High Energy Physics010308 nuclear & particles physicsSigmaLambda01 natural sciencesSpectral lineBaryonNuclear physicsCoincidentPhase space0103 physical sciencesMomentum conservationNuclear Experiment010306 general physicsPhysical Review C
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The RICH counter in the CERN hyperon beam experiment

1992

Abstract The hyperon beam experiment WA89 at the CERN-SPS uses a ring imaging Cherenkov counter (RICH) for identification of secondaries from ∑ − N reactions. Cherenkov photons are generated in a 5 m long radiator volume filled with nitrogen at atmospheric pressure and detected in drift chambers. The drift chambers cover an active surface of 1.6 × 0.75 m 2 , with a maximum drift path of 41 cm. Photoelectrons are counted on 1280 wires with a pitch of 2.54 mm, equipped with multihit TDCs. The counting gas is ethane saturated with TMAE at 30°C. The counter was operated in two beam periods in 1990 and 1991. The spatial resolution of the chambers is better than 2 mm and under normal running cond…

PhysicsWire chamberNuclear and High Energy PhysicsPhotonLarge Hadron ColliderAtmospheric pressurePhysics::Instrumentation and DetectorsHyperonPhotoelectric effectCharged particleParticle detectorNuclear physicsVolume (thermodynamics)Measuring instrumentHigh Energy Physics::ExperimentDetectors and Experimental TechniquesAtomic physicsInstrumentationCherenkov radiationBeam (structure)Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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