0000000000428580

AUTHOR

A. S. Müller

showing 3 related works from this author

Measurement of Z-pair production in e(+)e(-) collisions and constraints on anomalous neutral gauge couplings

2009

The ZZ production cross section is measured from a data sample corresponding to a total integrated luminosity of 452 pb−1, collected by the ALEPH experiment at LEP at centre-of-mass energies from 192 to 209 GeV. Individual cross sections, extracted at six centre-of-mass energies, are found to be in agreement with Standard Model calculations. The results are used to set limits on anomalous neutral gauge couplings. The ZZ production cross section is measured from a data sample corresponding to a total integrated luminosity of 452 pb−1 , collected by the ALEPH experiment at LEP at centre-of-mass energies from 192 to 209 GeV. Individual cross sections, extracted at six centre-of-mass energies, …

PhysicsAlephParticle physicsNuclear and High Energy PhysicsLuminosity (scattering theory)e+-e- Experiments010308 nuclear & particles physicsElectron–positron annihilationSettore FIS/01 - Fisica SperimentaleGauge (firearms)01 natural sciencesStandard ModelNuclear physicsE +e -experiments; Nuclear and High Energy PhysicsE +e -experimentsCross section (physics)Pair production0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]High Energy Physics::Experiment010306 general physicsALEPH experimentParticle Physics - Experiment
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Measurements of the muon component of extensive air showers at 320m.w.e. underground

2003

Abstract The ALEPH detector at LEP has been supplemented with five scintillator telescopes to measure the muon component of cosmic ray air showers underground. The emphasis of the present analysis of a new data set is to measure coincidences over distances up to about 1 km which are sensitive to the forward production of hadronic interactions and the chemical composition of primary cosmic rays in the energy range around 1015 eV. First results indicate that the observed decoherence curve of muons is compatible with a light primary composition and the arrival directions of muons show no obvious clustering in galactic coordinates.

PhysicsNuclear and High Energy PhysicsRange (particle radiation)MuonPhysics::Instrumentation and DetectorsAstrophysics::High Energy Astrophysical PhenomenaHadronDetectorAstrophysics::Instrumentation and Methods for AstrophysicsCosmic rayAstrophysicsScintillatorMeasure (mathematics)Nuclear physicsGalactic coordinate systemHigh Energy Physics::ExperimentInstrumentationNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Cosmic ray physics with the ALEPH detector

2000

Abstract ALEPH is one of the four detectors at the Large Electron–Positron Collider (LEP) at a depth of about 320 m.w.e. Its hadron calorimeter and scintillator arrays installed at distances up to about 1 km away from ALEPH are used to measure cosmic muon induced time coincidences over large distances. The aim of this experiment (CosmoALEPH) is (1) to study the muon component above 70 GeV of Extensive Air Showers (EAS) and (2) to test the feasibility of searching for time correlations over even larger distances (up to 8 km) between the four LEP detectors. Layout and first results of CosmoALEPH are presented demonstrating the potential for cosmic ray physics in the LEP tunnel. The multiplici…

PhysicsNuclear and High Energy PhysicsAlephParticle physicsAstrophysics and AstronomyCOSMIC cancer databaseMuonPhysics::Instrumentation and DetectorsAstrophysics::High Energy Astrophysical PhenomenaDetectorCosmic rayParticle detectorlaw.inventionNuclear physicslawHigh Energy Physics::ExperimentColliderInstrumentationLepton
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