Kavli Affiliate: Satoshi Shirai
| First 5 Authors: Gonzalo Herrera, Alejandro Ibarra, Satoshi Shirai, ,
| Summary:
In some scenarios, the dark matter particle predominantly scatters
inelastically with the target, producing a heavier neutral particle in the
final state. In this class of scenarios, the reach in parameter space of direct
detection experiments is limited by the velocity of the dark matter particle,
usually taken as the escape velocity from the Milky Way. On the other hand, it
has been argued that a fraction of the dark matter particles in the Solar
System could be bound to the envelope of the Local Group or to the Virgo
Supercluster, and not to our Galaxy, and therefore could carry velocities
larger than the escape velocity from the Milky Way. In this paper we estimate
the enhancement in sensitivity of current direct detection experiments to
inelastic dark matter scatterings with nucleons or electrons due to the
non-galactic diffuse components, and we discuss the implications for some well
motivated models.
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