5 papers
Structure Formation with Dark Magnetohydrodynamics
Pierce Giffin, Andrew Liu, Jeremias Boucsein +4
Long-range interactions in the dark sector can give rise to collective plasma phenomena that are capable of modifying the evolution of dark matter halos. We present the first study…
Exploring Invisible New Physics with Exotic Pion Decays
Wolfgang Altmannshofer, Jeff A. Dror, Pierce Giffin +5
We study the sensitivity of past and future stopped-pion experiments to light, invisible dark sector particles produced in exotic pion decays. We consider two-body decays involving…
Simplified Spin Dependence in Dark Matter Direct Detection
Pierce Giffin, Benjamin Lillard, Pankaj Munbodh +1
The interactions of dark matter with Standard Model particles can be systematically studied in the language of effective field theories. We investigate dark matter interactions wit…
Ultra-Strongly Self-Interacting Dark Matter: From Phenomenology to Astrophysical Observables
M. Grant Roberts, Wolfgang Altmannshofer, Pierce Giffin +1
We develop a minimal, testable framework for two-component self-interacting dark matter (SIDM) in which a dominant, moderately self-interacting species coexists with an ultra-stron…
Dark plasmas in the nonlinear regime: constraints from particle-in-cell simulations
William DeRocco, Pierce Giffin
If the dark sector possesses long-range self-interactions, these interactions can source dramatic collective instabilities even in astrophysical settings where the collisional mean…