Ελένη Ν. Παπανικολάου: (1912-1999)

Large ν μ → ν τ and ν e → ν τ transitions in short - baseline experiments ?

Considering four-neutrino schemes of type 3+1, we identify four small regions of the neutrino mixing parameter space compatible with all data. Assuming a small mixing between the sterile neutrino and the isolated mass eigenstate we show that large νμ → ντ and νe → ντ transitions are predicted in short-baseline experiments and could be observed in the near future in dedicated experiments. We dis...

Maximal ν μ − ν τ Mixing

The naturalness of maximal mixing between myon-and tau-neutri-nos is investigated. A spontaneously broken nonabelian generation symmetry can explain a small parameter which governs the deviation from maximal mixing. In many cases all three neutrino masses are almost degenerate. Maximal ν µ − ν τ-mixing would indicate that the leading contribution to the light neutrino masses arises from the exp...

Michael Abercrombie (1912-1979).

Richard Doll 1912–2005

the differences of organic production. However, the exclusion of synthetic pesticides and fertilizers from organic systems is fundamental. Given this, the authors asked, why did the magnitude of differences in species density and abundance vary so much between the different groups they looked at? One factor may be the differential impacts of timing and special scales on the colonization traits ...

Merck's Annual Report, 1912