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Author

James Unwin

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Preprint Oct 2026

An All-Sky Search for Moving Gamma-Ray Sources with Fermi-LAT

Nearby compact gamma-ray sources can move appreciably during the Fermi-LAT mission and thus evade searches that assume a stationary sky. Compact dark matter halos, dark matter spikes around primordial black holes (PBH), and evaporating PBH provide potential examples. We perform a novel all-sky search for steady point s...

D. Lai, James Unwin · 0 citations
Preprint Sep 2026

Heavy Higgsino Dark Matter at the Scale of the Vanishing Higgs Quartic

The Standard Model Higgs quartic coupling runs to zero around $10^9-10^{12}$ GeV at $2\sigma$, suggestive of an ultraviolet boundary condition $\lambda\simeq0$ at this scale. In a well-motivated class of high-scale supersymmetric (SUSY) models, the quartic is automatically set to zero at tree level at the superpartner...

James Unwin · 3 citations

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