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Peer-reviewedCC BY 4.0Journal of High Energy Physics

Dark matter attenuation inside the Earth: a Boltzmann equation approach

  • Chuan-Yang Xing1
  • Chen Xia2,3
  1. 1China University of Petroleum (East China)
  2. 2Chinese Academy of Sciences
  3. 3Shanghai Key Laboratory of Particle Accelerator Science and Technology
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Abstract

A bstract : For strongly interacting or boosted dark matter, propagation through the Earth can involve sizable scattering and energy loss, reshaping the underground flux in energy, direction, and normalization. Scattered particles may still fall within the detector acceptance, so the detector-side signal depends on phase-space transport from the Earth’s surface to the underground detector. In this work, we formulate this transport problem with the Boltzmann equation. Its integral solution organizes successive scattering effects as a deterministic expansion in scattering orders. We analyze the transport equation in flat-Earth and spherical-Earth geometries, and apply the method to Dirac dark matter with an isoscalar vector interaction. The iterative solution agrees well with the Monte Carlo spectra. "Image missing"

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Cite

BibTeXRIS
BibTeX
@article{xing2026dark,
  title = {{Dark matter attenuation inside the Earth: a Boltzmann equation approach}},
  author = {Chuan-Yang Xing and Chen Xia},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = oct,
  doi = {10.1007/jhep10(2026)077},
  url = {https://link.springer.com/10.1007/JHEP10(2026)077},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Dark matter attenuation inside the Earth: a Boltzmann equation approach
AU  - Chuan-Yang Xing
AU  - Chen Xia
PY  - 2026
DA  - 2026/10/07
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep10(2026)077
UR  - https://link.springer.com/10.1007/JHEP10(2026)077
AB  - A bstract : For strongly interacting or boosted dark matter, propagation through the Earth can involve sizable scattering and energy loss, reshaping the underground flux in energy, direction, and normalization. Scattered particles may still fall within the detector acceptance, so the detector-side signal depends on phase-space transport from the Earth’s surface to the underground detector. In this work, we formulate this transport problem with the Boltzmann equation. Its integral solution organizes successive scattering effects as a deterministic expansion in scattering orders. We analyze the transport equation in flat-Earth and spherical-Earth geometries, and apply the method to Dirac dark matter with an isoscalar vector interaction. The iterative solution agrees well with the Monte Carlo spectra. "Image missing"
SN  - 1029-8479
ER  -