Search results for "QUARK FRAGMENTATION"

showing 3 items of 3 documents

Measurement of the spin density matrix for the rho(0), K*(0)(892) and phi produced in Z(0) decays

1997

The spin density matrix elements for the rho(0), K-*0(892) and phi produced in hadronic Z(0) decays are measured in the DELPHI detector. There is no evidence for spin alignment of the K-*0(892) and phi, in the region x(p) less than or equal to 0.3 (x(p) = p/p(beam)), where rho(00) = 0.33 +/- 0.05 and rho(00) = 0.30 +/- 0.04, respectively. In the fragmentation region, x(p) greater than or equal to 0.4, there is some indication for spin alignment of the rho(0) and K-*0(892), since rho(00) = 0.43 +/- 0.05 and rho(00) = 0.46 +/- 0.08, respectively. These values are compared with those found in meson-induced hadronic reactions. For the phi, rho(00) = 0.30 +/- 0.04 for x(p) greater than or equal …

Nuclear and High Energy PhysicsMesonElectron–positron annihilationD-STARHadronANNIHILATIONSPartícules (Física nuclear)QUARK FRAGMENTATION; D-STAR; ANNIHILATIONS; HADRONS; MESONSNuclear physicsAngular distribution[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Matrix elementSpin densityDetectors de radiacióDELPHIPhysicsHADRONSD-STARQUARK FRAGMENTATIONLARGE ELECTRON POSITRON COLLIDERMESONSPARTICLE PHYSICS; LARGE ELECTRON POSITRON COLLIDER; DELPHIMass spectrumPARTICLE PHYSICSAtomic physicsParticle Physics - ExperimentPHYSICS LETTERS B
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Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016

2017

This article reports world averages of measurements of $b$-hadron, $c$-hadron, and $\tau$-lepton properties obtained by the Heavy Flavor Averaging Group using results available through summer 2016. For the averaging, common input parameters used in the various analyses are adjusted (rescaled) to common values, and known correlations are taken into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters, \CP~violation parameters, parameters of semileptonic decays and CKM matrix elements.

Physics and Astronomy (miscellaneous)HadronKOBAYASHI-MASKAWA MATRIX01 natural sciencesPhysics Particles & FieldsHigh Energy Physics - Experiment[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]QCPhysicsCabibbo–Kobayashi–Maskawa matrixPhysicsSettore FIS/01 - Fisica SperimentaleBEAUTYhep-phNuclear & Particles PhysicsHigh Energy Physics - PhenomenologyPhysical SciencesCP violationParticle Physics - ExperimentEXCITED CHARM MESONSTRIPLE-PRODUCT CORRELATIONSParticle physicsMesonHEAVY FLAVOURSlcsh:AstrophysicsCHARM0202 Atomic Molecular Nuclear Particle And Plasma PhysicsQUARK FRAGMENTATION FRACTIONS0103 physical scienceslcsh:QB460-466RELATIVE BRANCHING FRACTIONSB-D(0)-(B)OVER-BAR(D)(0) OSCILLATION FREQUENCYlcsh:Nuclear and particle physics. Atomic energy. RadioactivityEXCLUSIVE SEMILEPTONIC HEAVY010306 general physicsQED RADIATIVE-CORRECTIONS0206 Quantum PhysicsEngineering (miscellaneous)DECAY-WIDTH DIFFERENCETAU LEPTONSParticle Physics - PhenomenologyScience & Technologyhep-ex010308 nuclear & particles physicsHigh Energy Physics::Phenomenology[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]FORM-FACTOR RATIOSlcsh:QC770-798High Energy Physics::ExperimentLepton
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Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target

2017

Precise measurements of charged-kaon multiplicities in deep inelastic scattering were performed. The results are presented in three-dimensional bins of the Bjorken scaling variable x, the relative virtual-photon energy y, and the fraction z of the virtual-photon energy carried by the produced hadron. The data were obtained by the COMPASS Collaboration by scattering 160 GeV muons off an isoscalar 6 LiD target. They cover the kinematic domain 1 (GeV/c)2 < Q2 < 60 (GeV/c)^2 in the photon virtuality, 0.004 < x < 0.4, 0.1 < y < 0.7, 0.20 < z < 0.85, and W > 5 GeV/c^2 in the invariant mass of the hadronic system. The results from the sum of the z-integrated K+ and K- mu…

QuarkStrange quarkParticle physicsNuclear and High Energy PhysicsIsoscalarHadronFOS: Physical sciences[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]nucl-ex01 natural sciencesKaon multiplicitieStrange quark530High Energy Physics - ExperimentSubatomär fysikNuclear physicsHigh Energy Physics - Experiment (hep-ex)Subatomic Physics0103 physical sciencesNuclear Physics - Experimentddc:530Invariant massNuclear Experiment (nucl-ex)Nuclear Experiment010306 general physicsNuclear ExperimentPhysicsMuonhep-ex010308 nuclear & particles physicsScatteringQuark fragmentation functionDeep inelastic scatteringlcsh:QC1-999Quark fragmentation functionsDeep inelastic scattering; Kaon multiplicities; Quark fragmentation functions; Strange quark; Nuclear and High Energy PhysicsHigh Energy Physics::ExperimentParticle Physics - ExperimentKaon multiplicitieslcsh:PhysicsDeep inelastic scattering
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