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액시온 및 극한상호작용 연구단
액시온 및 극한상호작용 연구단
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Light WIMP Searches Involving Electron Scattering

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Title
Light WIMP Searches Involving Electron Scattering
Author(s)
J. D. Vergados; Ch. C. Moustakidis; Yeuk-Kwan E. Cheung; H. Ejiri; Yeongduk Kim; Jeong Yeon Lee
Publication Date
2018-04
Journal
ADVANCES IN HIGH ENERGY PHYSICS, v.2018, no.6257198, pp.1 - 14
Publisher
HINDAWI LTD
Abstract
In the present work we examine the possibility of detecting electrons in light dark matter searches. These detectors are considered to be the most appropriate for detecting dark matter particles with a mass in the MeV region. We analyze theoretically some key issues involved in such detection. More specifically we consider a particle model involving WIMPs interacting with fermions via Z-exchange. We find that for WIMPs with mass in the electron mass range the cross section for WIMP-atomic electron scattering is affected by the electron binding. For WIMPs more than 20 times heavier than the electron, the binding affects the kinematics very little. As a result, many electrons can be ejected with energy which increases linearly with the WIMP mass, but the cross section is somewhat reduced depending on the bound state wave function employed. On the other hand for lighter WIMPs, the effect of binding is dramatic. More specifically at most 10 electrons, namely, those with binding energy below 10 eV, become available even in the case of WIMPs with a mass as large as 20 times the electron mass. Even fewer electrons contribute if the WIMPs are lighter. The cross section is, however, substantially enhanced by the Fermi function corrections, which become more important at low energies of the outgoing electrons. Thus events of 0.5-2.5 per kg-y become possible
URI
https://pr.ibs.re.kr/handle/8788114/4586
ISSN
1687-7357
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
Files in This Item:
2. Vergados [PDF] Light WIMP Searches Involving Electron Scattering - IBS 사사표기.pdfDownload

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