Date and time: Tuesday, March 2nd at 16:00 CET

Speaker:  Tongyan Lin (UC San Diego)

Title: Dark matter scattering in dielectrics

Abstract: Direct detection experiments are rapidly advancing in the search for sub-GeV dark matter. As energy thresholds become lower, the many-body physics of a target material becomes increasingly important to understand in determining the dark matter signal. In this talk, I will show how dark matter scattering in dielectric materials can be understood in terms of the dielectric response. This provides both a useful conceptual framing, and also allows us to calculate several new effects. I will then discuss two applications: screening effects for dark matter electron scattering, and the Migdal effect in semiconductors.

Slides: files/2021_03_02_Tongyan-Lin.pdf

Video: https://www.youtube.com/watch?v=7vJgpLa4p2c&list=PL8qaKDyx77Z2s7HrTROgoKguzyHG23a4n&index=6