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Effects of threshold energy on reconstructions of properties of low-mass WIMPs in direct dark matter detection experiments

School of Physics and Technology, Xinjiang University, No. 666, Shengli Road, Urumqi, Xinjiang 830046, China

Xinjiang Astronomical Observatory, Chinese Academy of Sciences, No. 150, Science 1-Street, Urumqi, Xinjiang 830011, China

E-mail Address: sunweichao@xao.ac.cn

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, and

Chung-Lin Shan

http://orcid.org/0000-0003-0576-5101

Xinjiang Astronomical Observatory, Chinese Academy of Sciences, No. 150, Science 1-Street, Urumqi, Xinjiang 830011, China

E-mail Address: clshan@xao.ac.cn

Corresponding author.

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https://doi.org/10.1142/S0217751X18501208Cited by:0 (Source: Crossref)

Abstract

In this paper, we revisit our model-independent methods developed for reconstructing properties of Weakly Interacting Massive Particles (WIMPs) by using measured recoil energies from direct Dark Matter detection experiments directly and take into account more realistically non-negligible threshold energy. All expressions for reconstructing the mass and the (ratios between the) spin-independent and the spin-dependent WIMP–nucleon couplings have been modified. We focus on low-mass ( $m_{χ} ≲ 15$ GeV) WIMPs and present the numerical results obtained by Monte Carlo simulations. Constraints caused by non-negligible threshold energy and technical treatments for improving reconstruction results will also be discussed.

Keywords:

PACS: 95.35.+d

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