527 citations · 6.2k across the 99 of their papers we have counts for
43 papers · 1 filter
Confronting the Higgsino Interpretation of the LZ Event with the High-Energy Sideband
Nicholas L. Rodd, Benjamin R. Safdi, Tracy R. Slatyer +1
The LZ experiment has reported a single 248 keV nuclear recoil event in their ton-yr exposure on a xenon target. The absence of lower nuclear recoil events is naturally expl…
No Evidence for Superradiant Axions in LIGO-Virgo-KAGRA GWTC-5 Binary Black Hole Spins
Orion Ning, Benjamin R. Safdi, Catherine Welch
The quantum chromodynamics (QCD) axion and axion-like particles may form bound clouds around spinning black holes (BHs) when their Compton wavelength is comparable to the BH gravit…
Cosmological Neutron Stars Produce Diffuse Axion X-Ray Signatures
Orion Ning, Kailash Raman, Benjamin R. Safdi
Axion-like particles can be abundantly produced through scattering processes in the cores of neutron stars (NSs). If they are ultralight ( eV), then they can…
Clearing up the Strong problem
Joshua N. Benabou, Anson Hook, Claudio Andrea Manzari +2
The absence of a neutron electric dipole moment (EDM) constrains the quantum chromodynamics (QCD) theta angle to be less than one part in ten billion, posing the Strong proble…
Axion lines from nuclear de-excitations in galactic stellar populations
Orion Ning, Anupam Ray, Benjamin R. Safdi
We show that mono-energetic axions are produced in abundance through nuclear de-excitations in nearby galaxies such as M87, which is the central galaxy of the Virgo cluster, and th…
Wino and Real Minimal Dark Matter Excluded by Fermi Gamma-Ray Observations
Benjamin R. Safdi, Weishuang Linda Xu
We show that minimal, fermionic dark matter (DM) models in the -dimensional representation of the weak force with zero hypercharge that make up 100% of the DM under the standard…