Search results for "CHARGED-PARTICLE MULTIPLICITY"

showing 3 items of 3 documents

Energy dependence of inclusive spectra in e+ e- annihilation

1999

Inclusive charged hadron distributions as obtained from the DELPHI measurements at 130, 136, 161, 172 and 183 GeV are presented as a function of the variables rapidity, xi(p), p and transversal momenta. Data are compared with event generators and with MLLA calculations, in order to examine the hypothesis of local parton hadron duality. The differential momentum spectra show an indication for coherence effects in the production of soft particles. The relation between the energy dependence of the charged multiplicity and the rapidity distribution is examined. (C) 1999 Elsevier Science B.V. All rights reserved.

Nuclear and High Energy PhysicsParticle physicsE+E ANNIHILATIONElectron–positron annihilationHadronParton01 natural sciencesCHARGED-PARTICLE MULTIPLICITY; QCD JETS; E+E ANNIHILATION; FRAGMENTATION; EVENTSSpectral lineQCD JETSEVENTSNuclear physics0103 physical sciencesCHARGED-PARTICLE MULTIPLICITY[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]RapidityMultiplicity (chemistry)Nuclear Experiment010306 general physicsDELPHIPhysicsAnnihilation010308 nuclear & particles physicsLARGE ELECTRON POSITRON COLLIDERPARTICLE PHYSICS; LARGE ELECTRON POSITRON COLLIDER; DELPHIPARTICLE PHYSICSHigh Energy Physics::ExperimentFRAGMENTATIONParticle Physics - Experiment
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Energy dependence of the differences between the quark and gluon jet fragmentation

1996

Three jet events arising from decays of the Z beson, collected by the DELPHI detector, were used to measure differences in quark and gluon fragmentation. Gluon jets were anti-tagged by identifying b quark jets. Unbiased quark jets came from events with two jets plus one photon. Quark and gluon jet properties in different energy ranges were compared for the first time within the same detector. Quark and gluon jets of nearly the same energy in symmetric three jet event topologies were also compared. Using three independent methods, the average value of the ratio of the mean charged multiplicities of gluon and quark jets is [ r ] = 1.241 +/- 0.015 (stat.) +/- 0.025 (syst.). Gluon jets are broa…

QuarkParticle physicsE+E ANNIHILATIONPhysics and Astronomy (miscellaneous)Astrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::LatticeHadron7. Clean energy01 natural sciencesBottom quarkPartícules (Física nuclear)Nuclear physicsCOLLIDER0103 physical sciencesCHARGED-PARTICLE MULTIPLICITY[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]3-JET EVENTSDISTRIBUTIONSALPHA-SNuclear Experiment010306 general physicsDELPHIQuantum chromodynamicsPhysics010308 nuclear & particles physicsALGORITHMSHigh Energy Physics::PhenomenologyPerturbative QCDLEPgluon fragmentationLARGE ELECTRON POSITRON COLLIDERQCDPhoton structure functionCHARGED-PARTICLE MULTIPLICITY; E+E ANNIHILATION; ROOT-S; 3-JET EVENTS; ALPHA-S; LEP; DISTRIBUTIONS; ALGORITHMS; COLLIDER; QCDGluonThree-jet eventROOT-SLEP; DELPHI; 3-jet events; gluon fragmentationPARTICLE PHYSICS; LARGE ELECTRON POSITRON COLLIDER; DELPHIPARTICLE PHYSICSFísica nuclearHigh Energy Physics::ExperimentParticle Physics - Experiment
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Transverse energy production and charged-particle multiplicity at midrapidity in various systems from √sNN = 7.7 to 200 GeV

2016

Measurements of midrapidity charged-particle multiplicity distributions, dNch/dη, and midrapidity transverseenergy distributions, dET /dη, are presented for a variety of collision systems and energies. Included are distributions for Au + Au collisions at √sNN = 200, 130, 62.4, 39, 27, 19.6, 14.5, and 7.7 GeV, Cu + Cu collisions at √sNN = 200 and 62.4 GeV, Cu + Au collisions at √sNN = 200 GeV, U + U collisions at √sNN = 193 GeV, d + Au collisions at √sNN = 200 GeV, 3 He + Au collisions at √sNN = 200 GeV, and p + p collisions at √sNN = 200 GeV. Centrality-dependent distributions at midrapidity are presented in terms of the number of nucleon participants, Npart, and the number of constituent q…

charged-particle multiplicity distributionstransverse-energy distributionsHigh Energy Physics::ExperimentNuclear Experiment
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