0000000000921543

AUTHOR

Kirsten Drees

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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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