0000000000598115

AUTHOR

S. Wallis

showing 2 related works from this author

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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Antiproton-proton annihilation at rest into KKπ0π0

1997

Abstract The annihilation channel p p →K + K − π 0 in liquid hydrogen at rest has been studied with the Crystal Barrel detector at LEAR. The measured branching ratio is: BR ( p p → K + K − π 0 )=(2.37±0.15)×10 −3 . A partial wave analysis shows that this reaction is dominated by the π (K K ) S , K K ∗ (892) and π φ (1020) intermediate states. Weak signals are observed for π a 2 (1320), π f 2 (1270), π f 2 ′(1525) and K(Kπ) S . A satisfactory description of the Dalitz plot requires the introduction of π (K K ) P intermediate states with at least one pole.

PhysicsNuclear and High Energy PhysicsAnnihilationProton010308 nuclear & particles physicsBranching fractionPartial wave analysisDalitz plot01 natural sciencesCrystalNuclear physicsAngular distributionAntiproton0103 physical sciencesAtomic physics010306 general physicsPhysics Letters B
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