0000000000915823

AUTHOR

H Bertelsen

showing 4 related works from this author

A Study of Bose-Einstein Correlations In e+e- Annihilation At 91 Gev

1992

This paper describes a study of Bose-Einstein correlations made using the ALEPH detector at LEP. The correlations are found to enhance the two particle differential cross section for pairs of identical pions by a factor which can be roughly parametrized by R(Q) = 1 + lambda exp(-Q2-sigma(2)), where Q is the difference in the 3-momenta of the two pions in their centre of mass frame, lambda = 0.51 +/- 0.04 +/- 0.11 and sigma = 3.3 +/- 0.2 +/- 0.8 GeV-1, which corresponds to a source size of 0.65 +/- 0.04 +/- 0.16 fm. The large systematic errors on these results reflect their strong dependence on the choice of the reference sample used in the analysis. This problem is believed to occur primari…

PhysicsParticle physicsAnnihilationPhysics and Astronomy (miscellaneous)Electron–positron annihilationStrong interactionElementary particleBose–Einstein correlationsLEPResonance (particle physics)Nuclear physicsPionMONTE-CARLOCOHERENCEPARTICLESHigh Energy Physics::ExperimentQuantum field theoryNuclear ExperimentEngineering (miscellaneous)Particle Physics - ExperimentMULTIPLE PRODUCTION
researchProduct

ALICE: Physics performance report, volume II

2006

ALICE is a general-purpose heavy-ion experiment designed to study the physics of strongly interacting matter and the quark-gluon plasma in nucleus-nucleus collisions at the LHC. It currently involves more than 900 physicists and senior engineers, from both the nuclear and high-energy physics sectors, from over 90 institutions in about 30 countries. The ALICE detector is designed to cope with the highest particle multiplicities above those anticipated for Pb-Pb collisions (dN(ch)/dy up to 8000) and it will be operational at the start-up of the LHC. In addition to heavy systems, the ALICE Collaboration will study collisions of lower-mass ions, which are a means of varying the energy density, …

PhysicsParticle physicsNuclear and High Energy PhysicsLarge Hadron Collider010308 nuclear & particles physicsPhysicsDetectorMonte Carlo methodObservable7. Clean energy01 natural sciencesParticle identificationNuclear physics0103 physical sciencesALICE (propellant)010306 general physicsNuclear ExperimentALICE; physics; performance; detector; CERN; QGP; LHCEvent (particle physics)Event reconstruction
researchProduct

MEASUREMENT OF TAU BRANCHING RATIOS

1992

著者人数：112名

PhysicsParticle physicsPhysics and Astronomy (miscellaneous)Branching fractionElectron–positron annihilationLEPTON PRODUCTIONPIONSHadronEconomic intelligenceCELLO DETECTORBranching (polymer chemistry)Charged particlePARAMETERSNuclear physicsPionPETRAHigh Energy Physics::ExperimentEngineering (miscellaneous)Particle Physics - ExperimentLeptonDECAY MODES
researchProduct

Measurement of the charged particle multiplicity distribution in hadronic Z decays

1991

The charged particle multiplicity distribution of hadronic Z decays was measured on the peak of the Z resonance using the ALEPH detector at LEP. Using a model independent unfolding procedure the distribution was found to have a mean = 20.85 +/- 0.24 and a dispersion D = 6.34 +/- 0.12. Comparison with lower energy data supports the KNO scaling hypothesis in the energy range square-root s = 29-91.25 GeV. At square-root s = 91.25 GeV the shape of the multiplicity distribution is well described by a log-normal distribution, as predicted from a cascading model for multi-particle production. The same model also successfully describes the energy dependence of the mean and width of the multiplicity…

Quantum chromodynamicsPhysicsNuclear and High Energy PhysicsRange (particle radiation)Particle physicsE+E ANNIHILATIONPP COLLISIONSDistribution (number theory)Electron–positron annihilationQUARKHadronPETRA ENERGIESResonance (particle physics)Charged particleNuclear physicsMONTE-CARLOHigh Energy Physics::ExperimentFRAGMENTATIONScalingParticle Physics - Experiment
researchProduct