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Dark matter search by exclusive studies of X-rays following WIMPs nuclear interactions

H. Ejiri·Ch. C. Moustakidis·J. D. Vergados
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Abstract

It is shown that weakly interacting massive particles (WIMPs), which are possible cold dark matter candidates, can be studied by exclusive measurements of X-rays following WIMPs nuclear interactions. Inner-shell atomic electrons are ionized through WIMP-nuclear interaction, and then mono-energetic X-rays are emitted when they are filled by outer-shell electrons. The number of inner-shell holes amounts to as large as one per five nuclear recoils for K-shell and several per recoil for L-shell in the case of medium heavy target nuclei interacting with 100-300 GeV WIMPs. Then the K and L X-ray peaks show up in the 5-50 keV region. Consequently exclusive studies of the X-rays in coincidence with the nuclear recoils and the ionization electrons are found to provide excellent opportunities to detect WIMPs such as the Lightest Super Symmetric Particles (LSP)

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H. Ejiri, Ch. C. Moustakidis, J. D. Vergados. 2006-03-14. Dark matter search by exclusive studies of X-rays following WIMPs nuclear interactions. https://doi.org/10.1016/j.physletb.2006.03.037

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