Light WIMP Searches with sub-keV Germanium Detectors
Manoj Kumar Singh1*, H. T. Wong1
1Institute of Physics, Academia Sinica, Taipei, Taiwan
* presenting author:Manoj Kumar Singh,
The p-type point-contact germanium detectors are novel techniques offering kg-scale radiation sensors with sub-keV sensitivities. They have been used for light dark matter WIMPs searches and may have potential applications in neutrino physics. The TEXONO collaboration reports limits on weakly interacting massive particle (WIMP)-nucleon spin-independent elastic interaction cross-section with 39.5 kg-days data at the Kuo-Sheng Reactor Neutrino Laboratory in Taiwan [1], and with 53.9 kg-days data at the China Jinping Underground Laboratory in China [2]. Crucial to this study is the understanding of the selection procedures for the bulk and surface events differentiation at the sub-keV range [3]. In this report we will describe the methods and results which is used to identify the bulk and surface events in analysis techniques, as well as the calibration schemes to evaluate the selection efficiency factors.

[1] H. B. Li et al., Phys. Rev. Lett. 110, 261301 (2013).
[2] Q. Yue et al., Phys. Rev. D 90, 091701(R) (2014).
[3] H. B. Li et al., Astroparticle phys. 56, 1 (2014).

Keywords: Germanium Detector, Dark Matter