51 citations · 112 across the 12 of their papers we have counts for
14 papers
Axion search with telescope for radio astronomy (ASTRA): forecast for observations between 0.5 and 4~GHz
Utkarsh Bhura, David J. E. Marsh, Bradley R. Johnson +8
Axion dark matter (DM) is predicted to convert into radio waves in neutron star magnetospheres. We assess the detectability of this signal using a 5 m radio telescope to be install…
The COSMIC WISPers White Paper: The physics case for Weakly Interacting Slim Particles
Ariel Arza, Deniz Aybas, Shyam Balaji +124
Axions and other very weakly interacting slim particles (WISPs), with masses below 1 GeV, arise naturally in many extensions of the Standard Model of particle physics. In particula…
Fine-grained dark matter substructure and axion haloscopes
Ciaran A. J. O'Hare, Giovanni Pierobon
The velocity distribution of cold dark matter within galaxies is expected to exhibit ultra-fine-grained substructure as a result of the many foldings of an initially smooth phase-s…
Prospects for relic neutrino detection using nuclear spin experiments
Yeray Garcia del Castillo, Giovanni Pierobon, Dipan Sengupta +1
Direct detection of the cosmic neutrino background (CB) remains one of the most formidable experimental challenges in modern physics. In this work, we extend recent studies of C…
Towards a precision calculation of in the Standard Model IV: Estimating the impact of positronium formation
Tobias Binder, Marco Drewes, Yannis Georis +3
We present a first assessment of how the previously unexplored effect of positronium formation can impact on the value of the effective number of neutrino species in the Standard M…
One trick to treat them all: SuperEasy linear response for any hot dark matter in -body simulations
Giovanni Pierobon, Markus R. Mosbech, Amol Upadhye +1
We generalise the SuperEasy linear response method, originally developed to describe massive neutrinos in cosmological -body simulations, to any hot dark matter (HDM) species wi…
Everything hot everywhere all at once: Neutrinos and hot dark matter as a single effective species
Amol Upadhye, Markus R. Mosbech, Giovanni Pierobon +1
Observational cosmology is rapidly closing in on a measurement of the sum M_nu of neutrino masses, at least in the simplest cosmologies, while opening the door to probes of non-sta…
Axion minicluster streams in the solar neighbourhood
Ciaran A. J. O'Hare, Giovanni Pierobon, Javier Redondo
A consequence of QCD axion dark matter being born after inflation is the emergence of small-scale substructures known as miniclusters. Although miniclusters merge to form minihalos…
Miniclusters from axion string simulations
Giovanni Pierobon, Javier Redondo, Ken'ichi Saikawa +2
The properties of axion miniclusters and of the voids between them can have very strong implications for the discovery of axions and the dark matter of the Universe. These properti…
Axion minivoids and implications for direct detection
Benedikt Eggemeier, Ciaran A. J. O'Hare, Giovanni Pierobon +2
In the scenario in which QCD axion dark matter is produced after inflation, the Universe is populated by large inhomogeneities on very small scales. Eventually, these fluctuations…
Weaker yet again: mass spectrum-consistent cosmological constraints on the neutrino lifetime
Joe Zhiyu Chen, Isabel M. Oldengott, Giovanni Pierobon +1
We consider invisible neutrino decay in the ultra-relativistic limit and compute the neutrino anisotropy loss rate relevant for the cosmic microwave background (C…
Simulations of axion-like particles in the post-inflationary scenario
Ciaran A. J. O'Hare, Giovanni Pierobon, Javier Redondo +1
Axions and axion-like particles (ALPs) are some of the most popular candidates for dark matter, with several viable production scenarios that make different predictions. In the sce…
Cosmology of the companion-axion model: dark matter, gravitational waves, and primordial black holes
Zhe Chen, Archil Kobakhidze, Ciaran A. J. O'Hare +2
The companion-axion model introduces a second QCD axion to rescue the Peccei-Quinn solution to the strong-CP problem from the effects of colored gravitational instantons. As in sin…
Phenomenology of the companion-axion model: photon couplings
Zhe Chen, Archil Kobakhidze, Ciaran A. J. O'Hare +2
We study the phenomenology of the 'companion-axion model' consisting of two coupled QCD axions. The second axion is required to rescue the Peccei-Quinn solution to the strong-CP pr…