0000000001024474

AUTHOR

V. Lapchine

showing 2 related works from this author

Search For Light Neutral Higgs Particles Produced In Z0-decays

1990

A search for the neutral Higgs boson in Z0-decays has been performed using the DELPHI detector at the Large Electron Positron collider (LEP) at CERN. We looked for the decay of Z0 into a neutral Higgs particle and a pair of fermions. No events fulfilled the criteria for H0-production. Our results, which are based on an integrated luminosity of 530 nb-1, exclude a minimal Standard Model Higgs boson with a mass in the range 210 MeV/c2 to 14 GeV/c2 at 95% confidence level.

PhysicsNuclear and High Energy PhysicsParticle physicsLarge Hadron ColliderLuminosity (scattering theory)010308 nuclear & particles physicsElectron–positron annihilationHigh Energy Physics::PhenomenologyElementary particleFermion01 natural sciences7. Clean energyStandard ModelNuclear physics0103 physical sciencesLarge Electron–Positron ColliderPhysique des particules élémentairesHiggs boson[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Física nuclearHigh Energy Physics::Experiment010306 general physicsParticle Physics - Experiment
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Experimental study of the triple-gluon vertex

1991

Abstract In four-jet events from e+e− →Z0 →multihadrons one can separate the three principal contributions from the triple-gluon vertex, double gluon-bremsstrahlung and the secondary quark-antiquark production, using the shape of the two-dimensional angular distributions in the generalized Nachtmann-Reiter angle θ NR ∗ and the opening angle of the secondary jets. Thus one can identify directly the contribution from the triple-gluon vertex without comparison with a specific non-QCD model. Applying this new method to events taken with the DELPHI-detector we get for the ratio of the colour factor Nc to the fermionic Casimir operator C F : N c C F = 2.55 ± 0.55 ( stat. ) ± 0.4 ( fragm. + models…

Particle physicsCOLLISIONSNuclear and High Energy PhysicsE+E ANNIHILATION[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]LUND MONTE-CARLOElectron–positron annihilationHigh Energy Physics::LatticeNON-ABELIAN NATURE01 natural sciencesJET FRAGMENTATIONDECAYSPHYSICSAngular distribution3-GLUON VERTEX0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physicsQuantum chromodynamicsPhysics010308 nuclear & particles physicsLUND MONTE-CARLO; NON-ABELIAN NATURE; 4-JET EVENTS; JET FRAGMENTATION; E+E ANNIHILATION; 3-GLUON VERTEX; QCD; PHYSICS; COLLISIONS; DECAYSHigh Energy Physics::PhenomenologyCasimir elementQCDVertex (geometry)Gluon4-JET EVENTSFísica nuclearHigh Energy Physics::ExperimentParticle Physics - Experiment
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