6533b821fe1ef96bd127c1ac
RESEARCH PRODUCT
Direct neutrino mass measurements
E.w. Ottensubject
PhysicsNuclear and High Energy PhysicsParticle physicsPhysics::Instrumentation and DetectorsSolar neutrinoSolar neutrino problemAtomic and Molecular Physics and OpticsMuon captureNuclear physicsNeutrino detectorMeasurements of neutrino speedHigh Energy Physics::ExperimentNeutrinoNeutrino oscillationElectron neutrinodescription
The paper reports on recent progress and developments since the neutrino '92 conference in the search for finite neutrino masses by direct mass measurements. Regarding the mass of μ - and τ -neutrino experiments have been finished and come up with somewhat improved upper bounds; the negative m 2 -value for the μ -neutrino could be removed mostly. Indications of a 17 keV neutrino component in β -decay spectra have been disproved by a number of alternative experiments as well as by reanalysis of part of the original data. Regarding the electron neutrino mass, measurements by magnetic spectrometers are phasing out in favour of electrostatic filters with magnetic guiding fields. These experiments yielded so far a published upper limit of 7.2eV/c 2 , and a further improved one of 4.5eV/c 2 has been communicated to this conference. The problem of negative m 2 -values is discussed in some detail.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-01-01 | Nuclear Physics B - Proceedings Supplements |