0000000000925994

AUTHOR

C. Höppner

showing 2 related works from this author

Study of Σ(1385) and Ξ(1321) hyperon and antihyperon production in deep inelastic muon scattering

2013

Large samples of \Lambda, \Sigma(1385) and \Xi(1321) hyperons produced in deep-inelastic muon scattering off a ^6LiD target were collected with the COMPASS experimental setup at CERN. The relative yields of \Sigma(1385)^+, \Sigma(1385)^-, \bar{\Sigma}(1385)^-, \bar{\Sigma}(1385)^+, \Xi(1321)^-, and \bar{\Xi}(1321)^+ hyperons decaying into \Lambda(\bar{\Lambda})\pi were measured. The heavy hyperon to \Lambda and heavy antihyperon to \bar{\Lambda} yield ratios were found to be in the range 3.8% to 5.6% with a relative uncertainty of about 10%. They were used to tune the parameters relevant for strange particle production of the LEPTO Monte Carlo generator.

disParticle physicsStrange quarkdis; hyperon productionPhysics and Astronomy (miscellaneous)diLambda01 natural sciencesCOMPASSHigh Energy Physics - Experimenthyperon production0103 physical sciencesCHARGED CURRENT INTERACTIONSCHARGED CURRENT INTERACTIONS; (LAMBDA)OVER-BAR POLARIZATION; COMPASS010306 general physicsNuclear ExperimentEngineering (miscellaneous)Nuclear ExperimentPhysicsMuon010308 nuclear & particles physicsGenerator (category theory)High Energy Physics::PhenomenologyHyperon(LAMBDA)OVER-BAR POLARIZATIONSigmaProduction (computer science)High Energy Physics::ExperimentParticle Physics - ExperimentBar (unit)
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Composition of Primary Cosmic-Ray Nuclei at High Energies

2008

The TRACER instrument (``Transition Radiation Array for Cosmic Energetic Radiation'') has been developed for direct measurements of the heavier primary cosmic-ray nuclei at high energies. The instrument had a successful long-duration balloon flight in Antarctica in 2003. The detector system and measurement process are described, details of the data analysis are discussed, and the individual energy spectra of the elements O, Ne, Mg, Si, S, Ar, Ca, and Fe (nuclear charge Z=8 to 26) are presented. The large geometric factor of TRACER and the use of a transition radiation detector make it possible to determine the spectra up to energies in excess of 10$^{14}$ eV per particle. A power-law fit to…

PhysicsSpectral indexCOSMIC cancer databaseAstronomyAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsCosmic rayAstrophysicsRadiationAstrophysicsSpectral lineEffective nuclear chargeTransition radiation detectorSpace and Planetary ScienceTRACERAtomic physics
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