Dark matter electron interactions in detector materials
In order to understand current and upcoming results from experiments searching for DM induced electron recoils, a theoretical understanding of DM electron scatterings in detector materials is needed. This requires input both from dark matter and material physics, and so far DM electron interactions have only been studied within the dark photon model. In the dark photon model, the DM-electron scattering takes a relatively simple form, and the material responds to the scattering through a single "response function".
Relaxing the assumption of the dark photon model, and instead applying Non-Relativistic Effective Theory approach, we calculate the expected detector signature for a wide range of DM models in Silicon and Germanium. In the papers of this thesis, we find that in contrast to the single response function produced by the dark photon model, the material can respond with 7 different response functions. These novel response functions we show to generically arise in a wide range of DM-electron interactions. As such, the papers of this thesis vastly extends the forms of DM-electron interactions that can be studied in Silicon and Germanium based experiments. These interactions made studyable by the works underlying this thesis are not fringe cases, but generically arise in a wide range of models. To illustrate this we consider a range of simplified models with a DM particle with spin 0, spin 1/2 and spin 1.
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
Crystal responses to general dark matter-electron interactions
PHYSICAL REVIEW RESEARCH,; Vol. 3(2021)
Artikel i vetenskaplig tidskrift
R. Catena, D. Cole, T. Emken, M. Matas, N. Spaldin, W. Tarantino, E. Urdshals, Dark matter - electron interactions in materials beyond the dark photon model
Dark Matter electron scattering in detector materials
Stiftelsen Wilhelm och Martina Lundgrens Vetenskapsfond (2021-3861), 2021-06-01 -- 2022-12-31.
Empirisk bestämning av mörka materians spinn
Vetenskapsrådet (VR) (2018-05029), 2019-01-01 -- 2022-12-31.
C3SE (Chalmers Centre for Computational Science and Engineering)
lecture room PJ
Opponent: Professor Rikard Enberg, Department of Physics and Astronomy, Uppsala University, Sweden