“School of Physic”
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| Paper IPM / Physic / 11259 |
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The annihilation of dark matter particles captured by the Sun can lead to a neutrino flux observable in neutrino detectors. Considering the fact that these dark matter particles are non-relativistic, if a pair of dark matter
annihilate to a neutrino pair, the spectrum of neutrinos will be monochromatic. We show that in this case, even after averaging over production point inside the Sun, the oscillatory terms of the oscillation probability do
not average to zero. This leads to interesting observable features in the annual variation of the number of muon-track events. We show that smearing of the spectrum due to thermal distribution of dark matter inside the Sun is too
small to wash out this variation. We point out the possibility of studying the initial flavor composition via measuring the annual variation of the number of events.
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