365 citations · 2k across the 48 of their papers we have counts for
51 papers
An All-Sky Search for Moving Gamma-Ray Sources with Fermi-LAT
Dou Lai, James Unwin
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 spik…
Heavy Higgsino Dark Matter at the Scale of the Vanishing Higgs Quartic
James Unwin
The Standard Model Higgs quartic coupling runs to zero around GeV at , suggestive of an ultraviolet boundary condition at this scale. In a well-motiva…
Axion Portal Dark Matter and the LUX-ZEPLIN High-Recoil Event
James Unwin
LUX-ZEPLIN (LZ) has reported one event compatible with a nuclear recoil. While initial attention has focused on inelastic dark matter, that interpretation depend…
Constraining the Coexistence of Primordial Black Holes and Particle Dark Matter with Neutrino Observations
Prolay Chanda, Sagnik Mukherjee, James Unwin
Primordial black holes (PBH) with a uniform mass scale could contribute up to 1\% of the gravitationally inferred dark matter relic abundance and remain consistent with observation…
An Intermediate Scale R-axion \& the QCD Axion
James Unwin
An intermediate scale R-axion faces an immediate obstruction from the Dine-Festuccia-Komargodski (DFK) bound on the superpotential, , since for a nea…
Stabilizing Role of Uninformed Participants in Collective Decision Making
Leonardo Colombo, Marıa Emma Eyrea Irazu, Laura P. Schaposnik +1
For groups without strict hierarchy, collective decisions often emerge through compromise. We develop a second-order network model of collective decision-making using a dissipative…
Next-to-Minimal Freeze-in Dark Matter
Nicolás Bernal, Sagnik Mukherjee, James Unwin
If the dark matter mass exceeds the highest temperature of the thermal bath, then dark matter production is Boltzmann suppressed. This opens new possibilities for dark matter model…
Minimal Freeze-in Dark Matter: Reviving electroweak doublet dark matter with Boltzmann suppressed freeze-in
Nicolás Bernal, Sagnik Mukherjee, James Unwin
Dark matter communicating with the Standard Model solely via electroweak interactions provides a compelling picture. However, thermal freeze-out of electroweak doublet dark matter…
Boltzmann Suppressed Ultraviolet Freeze-in
Nicolás Bernal, Sagnik Mukherjee, James Unwin
If the dark matter mass exceeds the maximum temperature of the Universe (), then its production rate will be Boltzmann suppressed. The important implications o…
The Potential Impact of Primordial Black Holes on Exoplanet Systems
Garett Brown, Linda He, James Unwin
The orbits of planetary systems can be deformed from their initial configurations due to close encounters with larger astrophysical bodies. Typical candidates for close encounters…
Parametric Coincidence in the Baryon to Dark Matter Ratio from Affleck-Dine Baryogenesis and UV Freeze-in Dark Matter
Jae Hyeok Chang, Chang Sub Shin, James Unwin
We highlight that the observed concurrence between the baryon and dark matter relic densities can be explained via a parametric coincidence between two distinct production mechanis…
Constraining the Coexistence of Freeze-in Dark Matter and Primordial Black Holes
Prolay Chanda, Sagnik Mukherjee, James Unwin
Particle dark matter and primordial black holes (PBH) might coexist with appreciable cosmic abundances, with both contributing to the observed dark matter density . Lar…
Towards TeV-Scale Supersymmetric Electroweak Baryogenesis
Oleksii Matsedonskyi, James Unwin, Qingyun Wang
Electroweak baryogenesis (EWBG) offers a compelling narrative for the generation of the baryon asymmetry, however it cannot be realised in the Standard Model, and leads to severe e…
Improved Constraints on Dark Matter Annihilations Around Primordial Black Holes
Prolay Chanda, Jakub Scholtz, James Unwin
Cosmology may give rise to appreciable populations of both particle dark matter and primordial black holes (PBH) with the combined mass density providing the observationally inferr…
COVID-19 Forecasts via Stock Market Indicators
Yi Liang, James Unwin
Reliable short term forecasting can provide potentially lifesaving insights into logistical planning, and in particular, into the optimal allocation of resources such as hospital s…
Electroweak Symmetry Non-Restoration from Dark Matter
Oleksii Matsedonskyi, James Unwin, Qingyun Wang
Restoration of the electroweak symmetry at temperatures around the Higgs mass is linked to tight phenomenological constraints on many baryogenesis scenarios. A potential remedy can…
Decoupling of Asymmetric Dark Matter During an Early Matter Dominated Era
Prolay Chanda, James Unwin
In models of Asymmetric Dark Matter (ADM) the relic density is set by a particle asymmetry in an analogous manner to the baryons. Here we explore the scenario in which ADM decouple…
Racial Impact on Infections and Deaths due to COVID-19 in New York City
Yunseo Choi, James Unwin
Redlining is the discriminatory practice whereby institutions avoided investment in certain neighborhoods due to their demographics. Here we explore the lasting impacts of redlinin…
The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
Rouzbeh Allahverdi, Mustafa A. Amin, Asher Berlin +23
It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. W…
All-Pay Auctions as Models for Trade Wars and Military Annexation
Benjamin Kang, James Unwin
We explore an application of all-pay auctions to model trade wars and territorial annexation. Specifically, in the model we consider the expected resource, production, and aggressi…
All-Pay Auctions with Different Forfeits
Benjamin Kang, James Unwin
In an auction each party bids a certain amount and the one which bids the highest is the winner. Interestingly, auctions can also be used as models for other real-world systems. In…
Reviving and Higgs Mediated Dark Matter Models in Matter Dominated Freeze-out
Prolay Chanda, Saleh Hamdan, James Unwin
It is quite conceivable that dark matter freeze-out occurred during an early period of matter domination, in which case the evolution and relic abundance differ from standard freez…
What if Planet 9 is a Primordial Black Hole?
Jakub Scholtz, James Unwin
We highlight that the anomalous orbits of Trans-Neptunian Objects (TNOs) and an excess in microlensing events in the 5-year OGLE dataset can be simultaneously explained by a new po…
Ultraviolet Freeze-in and Non-Standard Cosmologies
Nicolás Bernal, Fatemeh Elahi, Carlos Maldonado +1
A notable feature of UV freeze-in is that the relic density is strongly dependent on the highest temperatures of the thermal bath, and a common assumption is that the relevant 'hig…