28 July 2020 to 6 August 2020
virtual conference
Europe/Prague timezone

New Limits on WIMP Dark Matter from Annual Modulation Analysis of the CDEX Experiment at the China Jinping Underground Laboratory

30 Jul 2020, 11:50
25m
virtual conference

virtual conference

Talk 09. Dark Matter Detection Dark Matter Detection

Speaker

Dr Hau-Bin Li (Academia Sinica, Taipei, Taiwan)

Description

Positive signatures in direct searches of WIMP dark matter are so far derived from Annual Modulation (AM) studies. We present the analysis and results of AM search [1] with data from a 1-kg p-type point-contact germanium detector of the CDEX experiment at the China Jinping Underground Laboratory [2]. The allowed regions due to DAMA/LIBRA and CoGeNT AM-data are probed and excluded. These results represent the most stringent bounds at WIMP-mass less than 6 GeV among WIMP-AM measurements. New limits on Light DM with Migdal effects [3] and on dark photons [4] will also be presented.

Reference:
[1] "Search for Light Weakly-Interacting-Massive-Particle Dark Matter by Annual Modulation Analysis with a Point-Contact Germanium Detector at the China Jinping Underground Laboratory", L.T. Yang et al., CDEX Collaboration, Phys. Rev. Lett. 123, 221301 (2020).
[2] "The China Jinping Underground Laboratory and its Early Science", J.P. Cheng et al., Ann. Rev. Nucl. Part. Sci. 67, 231 (2017).
[3] "Constraints on Spin-Independent Nucleus Scattering with sub-GeV Weakly Interacting Massive Particle Dark Matter from the CDEX-1B Experiment at the China Jinping Underground Laboratory", Z.Z. Liu et al., CDEX Collaboration, Phys. Rev. Lett. 123, 161301 (2019).
[4] "Direct detection constraints on dark photon with CDEX-10 experiment at CJPL", Z. She et al., CDEX Collaboration, arXiv:1910.13234 (2019).

Primary author

Dr Hau-Bin Li (Academia Sinica, Taipei, Taiwan)

Presentation Materials