Avi Friedlander
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View article: Dark matter decay to neutrinos
Dark matter decay to neutrinos Open
It is possible that the strongest interactions between dark matter and the Standard Model occur via the neutrino sector. Unlike gamma rays and charged particles, neutrinos provide a unique avenue to probe for astrophysical sources of dark …
View article: Dark matter from hot big bang black holes
Dark matter from hot big bang black holes Open
If the temperature of the hot thermal plasma in the early Universe was within a few orders of magnitude of the Planck scale ${M}_{\mathrm{Pl}}$, then the hoop conjecture predicts the formation of microscopic black holes from particle colli…
View article: Dark matter from higher-dimensional primordial black holes
Dark matter from higher-dimensional primordial black holes Open
The evaporation of primordial black holes provides a promising dark matter production mechanism without relying on any nongravitational interactions between the dark sector and the Standard Model. In theories of ``large'' extra dimensions …
View article: Dark Matter from Higher Dimensional Primordial Black Holes
Dark Matter from Higher Dimensional Primordial Black Holes Open
The evaporation of primordial black holes provides a promising dark matter production mechanism without relying on any non-gravitational interactions between the dark sector and the Standard Model. In theories of ``Large'' Extra Dimensions…
View article: Supermassive black hole seeds from sub-keV dark matter
Supermassive black hole seeds from sub-keV dark matter Open
Quasars observed at redshifts z ∼ 6–7.5 are powered by supermassive black holes which are too large to have grown from early stellar remnants without efficient super-Eddington accretion. A proposal for alleviating this tension is for dust …
View article: Dark matter from hot big bang black holes
Dark matter from hot big bang black holes Open
If the temperature of the hot thermal plasma in the Early Universe was within a few orders of magnitude of the Planck scale $M_{\rm Pl}$, then the hoop conjecture predicts the formation of microscopic black holes from particle collisions i…
View article: Supermassive black hole seeds from sub-keV dark matter
Supermassive black hole seeds from sub-keV dark matter Open
Quasars observed at redshifts $z\sim 6-7.5$ are powered by supermassive black holes which are too large to have grown from early stellar remnants without efficient super-Eddington accretion. A proposal for alleviating this tension is for d…
View article: Dark Matter Decay to Neutrinos
Dark Matter Decay to Neutrinos Open
Dark matter (DM) particles are predicted to decay into Standard Model particles which would\nproduce signals of neutrinos, gamma-rays, and other secondary particles. Neutrinos provide an\navenue to probe astrophysical sources of DM particl…
View article: Primordial black hole dark matter in the context of extra dimensions
Primordial black hole dark matter in the context of extra dimensions Open
Theories of large extra dimensions (LEDs) such as the Arkani-Hamed, Dimopoulos & Dvali scenario predict a "true" Planck scale $M_\star$ near the TeV scale, while the observed $M_{pl}$ is due to the geometric effect of compact extra dimensi…
View article: Baryogenesis and gravity waves from a UV-completed electroweak phase transition
Baryogenesis and gravity waves from a UV-completed electroweak phase transition Open
We study gravity wave production and baryogenesis at the electroweak phase\ntransition, in a real singlet scalar extension of the Standard Model, including\nvector-like top partners to generate the CP violation needed for electroweak\nbary…
View article: Wall speed and shape in singlet-assisted strong electroweak phase transitions
Wall speed and shape in singlet-assisted strong electroweak phase transitions Open
Models with singlet fields coupling to the Higgs can enable a strongly first\norder electroweak phase transition, of interest for baryogenesis and gravity\nwaves. We improve on previous attempts to self-consistently solve for the\nbubble w…