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First search for the absorption of fermionic dark matter with the PandaX-4T experiment
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First search for the absorption of fermionic dark matter with the PandaX-4T experiment
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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 $1.5\times10^{-50}$ cm$^2$ for a fermionic dark matter mass of $40$ MeV/$c^2$ with 90\% confidence level.
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Cited by 1 Pith paper
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Constraints on Fermionic Dark Matter Absorption from Radiochemical Solar-Neutrino Measurements
Reanalysis of solar neutrino capture rates yields 90% upper limits of 0.39-0.59 SNU on fermionic dark matter induced contributions, mapping to y bounds of 4.9-7.1 x 10^{-49} cm^2 at 1 MeV dark matter mass.
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