AI Article Synopsis
- - The study investigates how Galactic substructure impacts the capture and annihilation of weakly interacting massive particles (WIMPs) in the Sun and Earth, influencing the production of energetic neutrinos.
- - A time-varying capture rate due to Galactic substructure leads to fluctuations in the annihilation rate and neutrino flux, with potential delays between capture and annihilation events.
- - The neutrino flux could be influenced more by the historical density of dark matter along the Solar System's path than by current local densities, which could be reflected in the comparison of direct and indirect detection rates of these particles.
Article Abstract
We consider the effects of Galactic substructure on energetic neutrinos from annihilation of weakly interacting massive particles that have been captured by the Sun and Earth. Substructure gives rise to a time-varying capture rate and thus to time variation in the annihilation rate and resulting energetic-neutrino flux. However, there may be a time lag between the capture and annihilation rates. The energetic-neutrino flux may then be determined by the density of dark matter in the Solar System's past trajectory, rather than the local density. The signature of such an effect may be sought in the ratio of the direct- to indirect-detection rates.
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| http://dx.doi.org/10.1103/PhysRevLett.103.121301 | DOI Listing |
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