Search of Exotic Physics with Low Threshold Germanium Detector

Lakhwinder Singh^1*, Henry Tsz-King Wong¹

¹Institute of Physics, Academia Sinica, Taipei, Taiwan

* Presenter:Lakhwinder Singh, email:lakhwinder@gate.sinica.edu.tw

The existence of exotic physics is suggested by several realistic extensions of the standard model of elementary particle physics. Germanium ionization detectors with their unique features and diverse applications in fundamental research are novel candidates for the search of exotic particles. The TEXONO Collaboration aims to progressively improve the sensitivities towards exotic particles like low energy neutrinos and light dark matter candidates such as a sub-GeV WIMP, bosonic pseudoscalar and vector, sterile neutrino, and millicharged at the Kuo-Sheng Neutrino Laboratory (KSNL) in Taiwan and China Jinping Underground Laboratory (CJPL) in China. We will present highlights of our physics program on the studies of neutrino electromagnetic interactions [1,2] as well as neutrino-nucleus coherent elastic scattering [3,4]. We will also report our improved constraints on millicharged dark cosmic-rays and bosonic dark matter with a point-contact germanium detector [5,6].



[1] Jiunn-Wei Chen et al., Phys. Rev. D 91 013005 (2015).
[2] Jiunn-Wei Chen et al., Phys. Rev. D 90 011301(R) (2014).
[3] S. Kerman et al., Phys. Rev. D 93, 113006 (2016).
[4] H. T. Wong, Int. J. Mod. Phys. A Vol. 33, No. 16, 1830014 (2018).
[5] S.K. Liu et al., Phys. Rev. D 95, 052006 (2017).
[6] L. Singh et al., (2018), arXiv:1808.02719 [hep-ph].

Keywords: Dark Matter, Millicharged Partilces, Germanium Detectors