Speaker
Jiaming Zheng
(Shanghai JIao-tong University)
Description
Measuring dark matter (DM) signals via electron recoil provides an important means
for the direct detection of light DM particles. In this talk, I will show that the recent XENON1T anomaly with electron recoil energy around (2 − 3) keV can be naturally explained by the exothermic inelastic scattering between DM and electrons in a 2-component DM scenario. The stability of the heavier component is guaranteed by the small mass gap which sources the electron recoil energy. We provide an effective field analysis on this scenario focusing on the direct detection and relic density constraints. I will also discuss probable UV completions of this scenario.
Primary authors
He Hong-jian
(Shanghai Jiao-tong University, Tsinghua University, Peking University)
Wang Yu-chen
(Tsinghua University)
Jiaming Zheng
(Shanghai JIao-tong University)
