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18 April 2024 |
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Probing Light Dark Matter via Evaporation from the Sun | | Chris Kouvaris
; | | Date: |
13 Jun 2015 | | Abstract: | Dark matter particles can be captured by the sun with rates that depend on
the dark matter mass and the DM-nucleon cross section. However, for masses
below $sim 3.3$ GeV, the captured dark matter particles evaporate, leading to
an equilibrium where the rate of captured particles is equal to the rate of
evaporating ones. Unlike dark matter particles from the halo, the evaporating
dark matter particles have velocities that are not limited to values below the
escape velocity of the galaxy. Despite the fact that high velocities are
exponentially suppressed, I demonstrate here that current underground detectors
have the possibility to probe/constrain low dark matter parameter space by
(not)-observing the high energy tail of the evaporating dark matter particles
from the sun. I also show that the functional form of the differential rate of
counts with respect to the recoil energy in earth based detectors can identify
precisely the mass and the cross section of the dark matter particle in this
case. | | Source: | arXiv, 1506.4316 | | Services: | Forum | Review | PDF | Favorites | |
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