Compared with the signature of dark matter elastic scattering off nuclei, the absorption of fermionic dark matter by nuclei opens up a new searching channel for light dark matter with a characteristic monoenergetic signal. In this Letter, we explore the 95.0-day data from the PandaX-4T commissioning run and report the first dedicated searching results of the fermionic dark matter absorption signal through a neutral current process. No significant signal was found, and the lowest limit on the dark matter-nucleon interaction cross section is set to be for a fermionic dark matter mass of with 90% confidence level.
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"titles": [
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"source": "APS",
"title": "First Search for the Absorption of Fermionic Dark Matter with the PandaX-4T Experiment"
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"value": "10.1103/PhysRevLett.129.161803"
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"journal_title": "Physical Review Letters",
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"journal_issue": "16",
"year": 2022
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6
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"license": "CC-BY-4.0"
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"statement": "Published by the American Physical Society",
"year": "2022"
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"collaborations": [
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"abstracts": [
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"value": "Compared with the signature of dark matter elastic scattering off nuclei, the absorption of fermionic dark matter by nuclei opens up a new searching channel for light dark matter with a characteristic monoenergetic signal. In this Letter, we explore the 95.0-day data from the PandaX-4T commissioning run and report the first dedicated searching results of the fermionic dark matter absorption signal through a neutral current process. No significant signal was found, and the lowest limit on the dark matter-nucleon interaction cross section is set to be <math><mrow><mn>1.5</mn><mo>\u00d7</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>\u2212</mo><mn>50</mn></mrow></msup><mtext> </mtext><mtext> </mtext><msup><mrow><mi>cm</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math> for a fermionic dark matter mass of <math><mrow><mn>40</mn><mtext> </mtext><mtext> </mtext><mrow><mi>MeV</mi><mo>/</mo><msup><mrow><mi>c</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></mrow></math> with 90% confidence level."
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