Updated compilation shows PBHs are tightly constrained across 55 orders of magnitude in mass, ruling out dominant dark matter contributions except in narrow windows, with many limits carrying observational uncertainties.
Gravity and the stability of the Higgs vacuum
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abstract
We discuss the effect of gravitational interactions on the lifetime of the Higgs vacuum where generic quantum gravity corrections are taken into account. We show how small black holes can act as seeds for vacuum decay, spontaneously nucleating a new Higgs phase centered on the black hole with a lifetime measured in millions of Planck times rather than billions of years. The constraints on parameter space of corrections to the Higgs potential are outlined, and implications for collider black holes discussed.
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A model of late-time U(1)EM symmetry breaking via scalar-driven first-order phase transition predicts high-energy photon and neutrino bursts as long-range precursors detectable by multi-messenger facilities.
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Constraints on Primordial Black Holes
Updated compilation shows PBHs are tightly constrained across 55 orders of magnitude in mass, ruling out dominant dark matter contributions except in narrow windows, with many limits carrying observational uncertainties.
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Signals of Doomsday III: Cosmological signatures of the late time $U(1)_{EM}$ symmetry breaking
A model of late-time U(1)EM symmetry breaking via scalar-driven first-order phase transition predicts high-energy photon and neutrino bursts as long-range precursors detectable by multi-messenger facilities.