21 citations · 31 across the 8 of their papers we have counts for
9 papers · 1 filter
Enhancing Constraints on Ultralight Axion Dark Matter from Gravitational Capture
Pierce Giffin, Pankaj Munbodh, Elisa G. M. Ferreira
Ultralight axions can be gravitationally captured by massive bodies such as the Sun, producing solar-bound gravitational atom states that amplify the local dark matter density thro…
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…
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…
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…
Heavy Neutral Leptons at Beam Dump Experiments of Future Lepton Colliders
Pierce Giffin, Stefania Gori, Yu-Dai Tsai +1
A new beam dump experiment that utilizes the beam of future high energy electron-positron colliders could be an excellent avenue to search for dark sector particles due to its unpr…
Neutron Star Quantum Death by Small Black Holes
Pierce Giffin, John Lloyd, Samuel D. McDermott +1
Neutron stars can be destroyed by black holes at their center accreting material and eventually swallowing the entire star. Here we note that the accretion model adopted in the lit…
Higgs Production in Association with a Dark-Z at Future Electron Positron Colliders
Pierce Giffin, Ian M. Lewis, Ya-Juan Zheng
In recent years there have been many proposals for new electron-positron colliders, such as the Circular Electron-Positron Collider, the International Linear Collider, and the Futu…