Jun 14 – 16, 2023
AlbaNova Main Building
Europe/Stockholm timezone

Direct searches for general dark matter-electron interactions with graphene detectors

Jun 16, 2023, 9:45 AM
15m
Oskar Klein Auditorium FR4 (AlbaNova Main Building)

Oskar Klein Auditorium FR4

AlbaNova Main Building

Roslagstullsbacken 21, 114 21 Stockholm
Speaker in ELPA session Sektionen för elementarpartikel och astropartikelfysik Sektionen för elementarpartikel och astropartikelfysik

Speaker

Einar Urdshals (Chalmers Technical University)

Description

We employ a non-relativistic effective theory to model dark matter (DM) induced electron ejections from graphene and carbon nanotubes (CNTs), materials currently in the R&D phase for direct detection experiments. We employ Density Functional Theory to model the material properties of graphene, and obtain observable ejection rates for arbitrary forms of scalar and spin-1/2 DM. We show how the anisotropy of graphene and CNTs cause a strong daily modulation in the rate of electron ejections, a smoking gun signal for DM. We project 3 sigma discovery potential of such a daily modulation pattern, as well as expected exclusion bounds in the case of no observed daily modulation.

Primary author

Einar Urdshals (Chalmers Technical University)

Presentation materials