0000000000453973

AUTHOR

C. J. Batty

showing 3 related works from this author

The Crystal Barrel spectrometer at LEAR

1992

The crystal Barrel spectrometer used at LEAR, CERN to study the products of pd annihilations is described. A 1380 element array of Csl crystals measures photons from the decay of π0, η, η′ and ω mesons. A segmented drift chamber in a 1.5T magnetic field is used to identify and measure charged particles. A fast on-line trigger on charged and neutral multiplicities and on the invariant mass of secondary particles is available. The performance of the detector is discussed.

PhysicsNuclear and High Energy PhysicsPhotonLarge Hadron ColliderSpectrometerMesonPhysics::Instrumentation and Detectors010308 nuclear & particles physics01 natural sciencesCharged particleMagnetic fieldNuclear physicsCrystal0103 physical sciencesInvariant mass[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]Detectors and Experimental Techniques010306 general physicsInstrumentation
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Proton-antiproton annihilation into ηηπ-observation of a scalar resonance decaying into ηη

1992

Abstract The results of a measurement of pp annihilation at rest into ηηπ 0 are presented. Assuming a resonance dominated model for the annihilation process an isoscalar J PC =0 ++ resonance decaying into ηη is observed with a mass of 1560±25 MeV/ c 2 and a width of 245±50 MeV/ c 2 .

PhysicsNuclear and High Energy PhysicsParticle physicsAnnihilationProton010308 nuclear & particles physicsIsoscalarNuclear TheoryScalar (mathematics)Dalitz plot01 natural sciencesResonance (particle physics)Nuclear physicsAntiproton0103 physical sciencesMass spectrum010306 general physicsPhysics Letters B
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Momentum dependence of the decay η→π+π−π0

1998

Abstract The π 0 momentum dependence of the decay η → π + π − π 0 has been measured with the Crystal Barrel detector. The analysis is based on 3230 events. The results of this independent measurement are compared to new chiral perturbation theory calculations and previous measurements.

CrystalNuclear physicsMomentumPhysicsNuclear and High Energy PhysicsChiral perturbation theoryPhysics::Instrumentation and DetectorsDetectorBarrel (horology)Dalitz plotPhysics Letters B
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