We describe a "neutrinogenesis" mechanism whereby, in the presence of right-handed neutrinos with sufficiently small pure Dirac masses, (B+L)-violating sphaleron processes create the baryon asymmetry of the Universe, even when B = L = 0 initially. It is shown that the resulting neutrino mass constraints are easily fulfilled by the neutrino masses suggested by current experiments. We present a simple toy model which uses this mechanism to produce the observed baryon asymmetry of the Universe.
We study in a quantitative way CP-violating effects in neutrino oscillation
experiments in the light of current and future data. Different scenarios with
three and four neutrinos are worked out in detail including matter effects in
long baseline experiments and it is shown that in some cases CP-violating
effects could affect the analysis of a possible measurement. In particular in
the three neutrino case we find that the effects can be larger than expected,
at least in long-baseline $\nu_\mu\to\nu_e$. Moreover, measuring these effects
could give useful information on the solar oscillation frequency. In four
neutrino scenarios large effects are possible both in the $\nu_\mu\to\nu_\tau$
and $\nu_\mu\to\nu_e$ channels of long-baseline experiments, whereas
short-baseline experiments are affected only marginally.Comment: 30 pages, 6 figures. Final version to appear in Nuclear Physics
We discuss the potential to determine leading oscillation parameters, the value and the sign of ∆m 2 31 , as well as the magnitude of sin 2 2θ 13 using a conventional wide band neutrino beam pointing to water or ice Cherenkov neutrino detectors known as "Neutrino Telescopes". We find that precision measurements of ∆m 2 31 and θ 23 are possible and that, even though it is not possible to discriminate between charges in the detector, there is a remarkably good sensitivity to the mixing angle θ 13 and the sign of ∆m 2 31 .
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