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arXiv · 2308.02204

An Improved Bound on Accelerated Light Dark Matter

Liangliang Su·Lei Wu·Bin Zhu
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Abstract

Light (sub-GeV) dark matter has gained increasing interest in terms of direct detection. Accelerated dark matter is a promising candidate that can generate detectable nuclear recoil energy within the sub-GeV range. Because of the large kinetic energy, its interactions with the nucleus are predominantly governed by inelastic scattering, including quasi-elastic and deep inelastic scattering. In this work, we calculated the inelastic effects in dark matter--Earth scattering mediated by a vector particle. Our analysis revealed that the impact of inelastic scattering relies on the mediator mass and the kinetic energy spectrum of dark matter. The results exhibited considerable disparity: the upper bounds of the exclusion limit for the spin-independent cross-section between accelerated dark matter and nuclei via a heavy mediator differ by several tens of times when inelastic scattering is considered.

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Liangliang Su, Lei Wu, Bin Zhu. 2023-08-04. An Improved Bound on Accelerated Light Dark Matter. https://doi.org/10.1007/s11433-023-2244-7

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