منابع مشابه
Four Puzzles of Neutrino Mixing
There are four puzzling questions about by the magnitudes of neutrino mixings and mass splittings. A brief sketch is given of the various kinds of models of neutrino masses and how they answer these questions. Special attention is given to so-called “lopsided” models. 1 Comparison of Quarks and Leptons Over the last three decades theorists have been trying to understand the spectrum of quark an...
متن کاملFour-neutrino mixing solutions of the atmospheric neutrino anomaly
Four-neutrino (4ν) [1–3] models including a hypothetical sterile state (νs) can accommodate the three sources of evidence for ν flavor oscillations coming from atmospheric, solar, and accelerator neutrino experiments. In particular, 4ν spectra with mass eigenstates organized in two doublets (2+2 models) seem to be favored by world neutrino data [4]. Although 2+2 models are often assumed to impl...
متن کاملFour-Neutrino Mixing and Long-Baseline Experiments
We consider the two four-neutrino schemes that are compatible with all neutrino oscillation data. We present the range of the corresponding mixing parameters allowed by the results of neutrino oscillation experiments. We discuss the implications for long-baseline experiments and we suggest the possibility to reveal the presence of CP-violating phases through a comparison of the oscillation prob...
متن کاملFour-Neutrino Mixing and Big-Bang Nucleosynthesis
We investigate the Big-Bang Nucleosynthesis constraints on neutrino mixing in the framework of the two four-neutrino schemes that are favored by the results of neutrino oscillation experiments. We discuss the implications of these constraints for terrestrial short and long-baseline neutrino oscillation experiments and we present some possibilities of testing them in these experiments. In partic...
متن کاملExperimental Constraints on Four-Neutrino Mixing
It is shown that at least four massive neutrinos are needed in order to accommodate the evidences in favor of neutrino oscillations found in solar and atmospheric neutrino experiments and in the LSND experiment. Among all four-neutrino schemes, only two are compatible with the results of all neutrino oscillation experiments. These two schemes have a mass spectrum composed of two pairs of neutri...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 1999
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(99)01094-1