0000000000654213

AUTHOR

F. Spanier

showing 2 related works from this author

Improved Upper Limit on the Neutrino Mass from a Direct Kinematic Method by KATRIN

2019

We report on the neutrino mass measurement result from the first four-week science run of the Karlsruhe Tritium Neutrino experiment KATRIN in spring 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are energy analyzed by a high-resolution MAC-E filter. A fit of the integrated electron spectrum over a narrow interval around the kinematic end point at 18.57 keV gives an effective neutrino mass square value of (−1.0−1.1+0.9) eV2. From this, we derive an upper limit of 1.1 eV (90% confidence level) on the absolute mass scale of neutrinos. This value coincides with the KATRIN sensitivity. It improves upon previous mass limits from kinematic measurements by almost a …

Semileptonic decayPhysics - Instrumentation and DetectorsCosmology and Nongalactic Astrophysics (astro-ph.CO)Physics::Instrumentation and DetectorsFOS: Physical sciencesGeneral Physics and AstronomyKinematicsElectron[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]KATRIN01 natural sciences7. Clean energyHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)mass: scaleneutrino: mass: measured0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]ddc:530S066MAESensitivity (control systems)Limit (mathematics)structure[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]Nuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentPhysicstritiumPhysicsformationS066M2EInstrumentation and Detectors (physics.ins-det)semileptonic decaysensitivityddc:kinematicsElementary Particles and Fieldselectron: energy spectrumHigh Energy Physics::ExperimentPräzisionsexperimente - Abteilung BlaumNeutrino[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Energy (signal processing)Astrophysics - Cosmology and Nongalactic AstrophysicsKATRINexperimental results
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Multifrequency Studies of the Peculiar Quasar 4C +21.35 during the 2010 Flaring Activity

2014

著者人数: 290名

AstrofísicaelectronPhotontorusAstrophysics01 natural scienceslaw.inventiongalaxies: active – gamma rays: general – quasars: general – quasars: individual (4C +21.35) – radiation mechanisms: non-thermalactive gamma rays: general quasars: general quasars: individual: 4C +21.35 radiation mechanisms: non-thermal [galaxies]lawblack hole: Kerrgalaxies: active; gamma rays: general; quasars: general; quasars: individual: 4C +21.35; radiation mechanisms: non-thermalopticalGalaxies: active; Gamma rays: general; Quasars: general; Quasars: individual (4C +21.35); Radiation mechanisms: non-thermal010303 astronomy & astrophysicsastro-ph.HEHigh Energy Astrophysical Phenomena (astro-ph.HE)Physicsenergy: highPhysicsphotonRadiusnon-thermal [radiation mechanisms]Synchrotrongamma ray: emissionactive [galaxies]astro-ph.COElectrónicaFísica nuclearElectricidadGalaxies: active; Gamma rays: general; Quasars: general; Quasars: individual (4C +21.35); Radiation mechanisms: non-thermal; Nuclear and High Energy PhysicsAstrophysics - High Energy Astrophysical Phenomenaquasars: individual (4C +21.35)Astrophysics - Cosmology and Nongalactic AstrophysicsFlareradiation mechanisms: non-thermal; galaxies: active; quasars: general; quasars: individual (4C +21.35); gamma rays: observationsNuclear and High Energy PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)astro-ph.GAAstrophysics::High Energy Astrophysical Phenomenaeducationgalaxies: activeFOS: Physical sciencesquasars: individual: 4C +21.35Astrophysics::Cosmology and Extragalactic AstrophysicsVHEGLASTemission: modelTelescopeX-rayquasars: general0103 physical sciencessynchrotrongalaxies: active gamma rays: general quasars: general quasars: individual: 4C +21.35 radiation mechanisms: non-thermalquasarflux: densityindividual: 4C +21.35 [quasars]Astrophysics::Galaxy AstrophysicsAstronomia Observacionsgeneral [quasars]010308 nuclear & particles physicsAstronomy and AstrophysicsQuasargamma rays: generalradiation mechanisms: non-thermalAstrophysics - Astrophysics of GalaxiesMAGICRotating black holeSpace and Planetary SciencegravitationAstrophysics of Galaxies (astro-ph.GA)ddc:520spectral[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]general [gamma rays]Fermi Gamma-ray Space Telescope
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