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hep-ph2026
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…
hep-ph2026
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…