Direct determination of the atomic mass difference ofRe187andOs187for neutrino physics and cosmochronology

Direct Determination of Neutrino Mass

The sum of the masses of the three neutrino mass eigenstates is now constrained both from above and below, and lies between 55 and 6900 meV. The lower limit is set by neutrino oscillations and the fact that masses are non-negative. The upper limit is set by laboratory measurements on the beta decay of tritium. These determinations share a common characteristic of being essentially model indepen...

Physics of Neutrino Mass

For a long time, it was believed that neutrinos are massless, spin half particles, making them drastically different from their other standard model spin half cousins such as the charged leptons (e, μ, τ) and the quarks (u, d, s, c, t, b), which are known to have mass. In fact the masslessness of the neutrino was considered so sacred in the 1950s and 1960s that the fundamental law of weak inter...

Low-Energy Neutrino Physics and Neutrino Mass

Neutrino mass hierarchy determination and other physics potential of medium - baseline reactor neutrino oscillation experiments ∗

Medium-baseline reactor neutrino oscillation (MBRO) experiments have been proposed to determine the neutrino mass hierarchy (MH) and to make precise measurements of the neutrino oscillation parameters. With sufficient statistics, better than ∼ 3%/ √ E(MeV ) energy resolution and well understood energy non-linearity, MH can be determined by analyzing oscillation signals driven by the atmospheric...

Direct determination of neutrino mass parameters at future colliders

If the observed light neutrino masses are induced by their Yukawa couplings to singlet right-handed neutrinos, natural smallness of those renders direct collider tests of the electroweak scale neutrino mass mechanisms almost impossible both in the case of Dirac and Majorana (seesaw of type I) neutrinos. However, in the triplet Higgs seesaw scenario the smallness of light neutrino masses may com...