Speaker
Lei Wu
(Nanjing Normal Univeristy)
Description
Plasmon, a collective mode of electronic excitation in solid-state detectors, provides a novel way to detect light dark matter (DM). In this work, we present the conditions of DM to produce plasmon resonance, requiring relativistic velocities for light DM, and generalize the collective excitation framework to account for relativistic DM. As a demonstration, we consider the cosmic ray boosted DM (CRDM) and find that the plasmon resonance can be significantly enhanced in the scenario with a light mediator. Utilizing the first data from the SENSEI experiment with the skipper-CCDs at SNOLAB, we obtain a new strong limit on the sub-MeV DM-electron scattering cross section.
Primary authors
Prof.
Bin Zhu
(Yantai University)
Lei Wu
(Nanjing Normal Univeristy)
Dr
Liangliang Su
(Nanjing Normal University)
Dr
Zhengliang Liang
(Beijing University of Chemical Technology)
