We report a novel search for the cosmic-ray boosted dark matter using the full dataset of the PandaX-II detector located at the China Jinping Underground Laboratory. With the extra energy gained from the cosmic rays, sub-GeV dark matter particles can produce visible recoil signals in the detector. The diurnal modulations in rate and energy spectrum are utilized to further enhance the signal sensitivity. Our result excludes the dark matter–nucleon elastic scattering cross section between and for dark matter masses from to , with a large parameter space previously unexplored by experimental collaborations.
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"titles": [
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"title": "Search for Cosmic-Ray Boosted Sub-GeV Dark Matter at the PandaX-II Experiment"
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"journal_title": "Physical Review Letters",
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"statement": "Published by the American Physical Society",
"year": "2022"
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"abstracts": [
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"value": "We report a novel search for the cosmic-ray boosted dark matter using the <math><mrow><mn>100</mn><mtext> </mtext><mtext> </mtext><mi>tonne</mi><mo>\u00b7</mo><mi>day</mi></mrow></math> full dataset of the PandaX-II detector located at the China Jinping Underground Laboratory. With the extra energy gained from the cosmic rays, sub-GeV dark matter particles can produce visible recoil signals in the detector. The diurnal modulations in rate and energy spectrum are utilized to further enhance the signal sensitivity. Our result excludes the dark matter\u2013nucleon elastic scattering cross section between <math><mrow><msup><mrow><mn>10</mn></mrow><mrow><mo>\u2212</mo><mn>31</mn></mrow></msup></mrow></math> and <math><mrow><msup><mrow><mn>10</mn></mrow><mrow><mo>\u2212</mo><mn>28</mn></mrow></msup><mtext> </mtext><mtext> </mtext><msup><mrow><mi>cm</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math> for dark matter masses from <math><mrow><mn>0.1</mn><mtext> </mtext><mtext> </mtext><mi>MeV</mi><mo>/</mo><msup><mrow><mi>c</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math> to <math><mrow><mn>0.1</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi><mo>/</mo><msup><mi>c</mi><mn>2</mn></msup></mrow></math>, with a large parameter space previously unexplored by experimental collaborations."
}
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