Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-11-19
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages including 2 figures, Latex, uses epsf.tex, Presented to Neutrino-96, Helsinki, June 1996
Scientific paper
We summarize a general formulation of particle propagation in fluctuating media, as applied to the description of neutrino propagation through the sun. It contains the familiar MSW effective hamiltonian, plus corrections which describe neutrino interactions with fluctuations in the medium. An estimate of the size of these corrections for a simple model of solar fluctuations is made, with the conclusion that they can produce surprisingly large effects since they grow with the correlation length of the fluctuation. For MSW oscillations, the leading effect for small fluctuations is to diminish the quality of the resonance, making the suppression of the ${}^7$Be neutrinos an experimental probe of fluctuations deep within the sun. Fluctuations can also provide an energy-independent suppression factor of $\hf$, away from the resonant region, even for small vacuum mixing angles. To be even potentially detectable, density fluctuations must be correlated on scales of hundreds of kilometres, and have amplitudes of a few percent or larger.
Burgess Cliff P.
Michaud D.
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