Publications
2025
Supernova bounds on new scalars from resonant and soft emission
Hardy, E., Sokolov, A., & Stubbs, H. (2025). Supernova bounds on new scalars from resonant and soft emission. Journal of High Energy Physics, 2025(4). doi:10.1007/jhep04(2025)013
Searching for a dark matter induced galactic axion gradient
Hardy, E., Reig, M., & Smirnov, J. (2025). Searching for a dark matter induced galactic axion gradient. Physical Review D, 111(1). doi:10.1103/physrevd.111.015006
2024
Percolating cosmic string networks from kination
Conlon, J. P., Copeland, E. J., Hardy, E., & González, N. S. (2024). Percolating cosmic string networks from kination. Physical Review D, 110(8). doi:10.1103/physrevd.110.083537
More axion stars from strings
Gorghetto, M., Hardy, E., & Villadoro, G. (2024). More axion stars from strings. Journal of High Energy Physics, 2024(8). doi:10.1007/jhep08(2024)126
Dark energy with the help of interacting dark sectors
Gomes, J. M., Hardy, E., & Parameswaran, S. (2024). Dark energy with the help of interacting dark sectors. Physical Review D, 110(2). doi:10.1103/physrevd.110.023533
2023
Searching for wave-like dark matter with QSHS
Bailey, I., Chakraborty, B., Chapman, G., Daw, E. J., Gallop, J., Gregori, G., . . . Withington, S. (2023). Searching for wave-like dark matter with QSHS. SciPost Physics Proceedings, (12). doi:10.21468/scipostphysproc.12.040
Listening for dark photon radio signals from the Galactic Center
Hardy, E., & Song, N. (2023). Listening for dark photon radio signals from the Galactic Center. PHYSICAL REVIEW D, 107(11). doi:10.1103/PhysRevD.107.115035
Post-inflationary axions: a minimal target for axion haloscopes
Gorghetto, M., & Hardy, E. (2023). Post-inflationary axions: a minimal target for axion haloscopes. JOURNAL OF HIGH ENERGY PHYSICS, (5). doi:10.1007/JHEP05(2023)030
2022
A next-generation liquid xenon observatory for dark matter and neutrino physics
Aalbers, J., AbdusSalam, S. S., Abe, K., Aerne, V., Agostini, F., Ahmed Maouloud, S., . . . Zupan, J. (2022). A next-generation liquid xenon observatory for dark matter and neutrino physics. Journal of Physics G: Nuclear and Particle Physics, 50(1), 013001. doi:10.1088/1361-6471/ac841a
Dark photon stars: formation and role as dark matter substructure
Gorghetto, M., Hardy, E., March-Russell, J., Song, N., & West, S. M. (2022). Dark photon stars: formation and role as dark matter substructure. Journal of Cosmology and Astroparticle Physics, 2022(08), 018. doi:10.1088/1475-7516/2022/08/018
2021
Axion quasiparticles for axion dark matter detection
Schütte-Engel, J., Marsh, D. J. E., Millar, A. J., Sekine, A., Chadha-Day, F., Hoof, S., . . . Šmejkal, L. (2021). Axion quasiparticles for axion dark matter detection. Journal of Cosmology and Astroparticle Physics, 2021(08), 066. doi:10.1088/1475-7516/2021/08/066
More axions from strings
Gorghetto, M., Hardy, E., & Villadoro, G. (2021). More axions from strings. SCIPOST PHYSICS, 10(2). doi:10.21468/SciPostPhys.10.2.050
Observing Invisible Axions with Gravitational Waves
Gorghetto, M., Hardy, E., & Nicolaescu, H. (2021). Observing invisible axions with gravitational waves. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, (6). doi:10.1088/1475-7516/2021/06/034
2020
Exploring Hamiltonian truncation in d=2+1
Elias-Miró, J., & Hardy, E. (2020). Exploring Hamiltonian truncation in d=2+1. Physical Review D, 102(6). doi:10.1103/physrevd.102.065001
2019
Thermal dark energy
Hardy, E., & Parameswaran, S. (2020). Thermal dark energy. PHYSICAL REVIEW D, 101(2). doi:10.1103/PhysRevD.101.023503
Hearing without seeing: gravitational waves from hot and cold hidden sectors
Fairbairn, M., Hardy, E., & Wickens, A. (2019). Hearing without seeing: gravitational waves from hot and cold hidden sectors. Journal of High Energy Physics, 2019(7). doi:10.1007/JHEP07(2019)044
2018
Axions from strings: the attractive solution
Gorghetto, M., Hardy, E., & Villadoro, G. (2018). Axions from strings: the attractive solution. The Journal of High Energy Physics, 2018. doi:10.1007/JHEP07(2018)151
Higgs portal dark matter in non-standard cosmological histories
Hardy, E. (2018). Higgs portal dark matter in non-standard cosmological histories. JOURNAL OF HIGH ENERGY PHYSICS, (6). doi:10.1007/JHEP06(2018)043
2017
Non-perturbative reheating and Nnaturalness
Hardy, E. (2017). Non-perturbative reheating and Nnaturalness. JOURNAL OF HIGH ENERGY PHYSICS, (11). doi:10.1007/JHEP11(2017)125
Glueball dark matter in non-standard cosmologies
Acharya, B. S., Fairbairn, M., & Hardy, E. (2017). Glueball dark matter in non-standard cosmologies. JOURNAL OF HIGH ENERGY PHYSICS, (7). doi:10.1007/JHEP07(2017)100
Symmetric and asymmetric reheating
Hardy, E., & Unwin, J. (2017). Symmetric and asymmetric reheating. JOURNAL OF HIGH ENERGY PHYSICS, (9). doi:10.1007/JHEP09(2017)113
Stellar cooling bounds on new light particles: plasma mixing effects
Hardy, E., & Lasenby, R. (2017). Stellar cooling bounds on new light particles: plasma mixing effects. JOURNAL OF HIGH ENERGY PHYSICS, 2017(2). doi:10.1007/JHEP02(2017)033
2016
Miniclusters in the axiverse
Hardy, E. (2017). Miniclusters in the axiverse. JOURNAL OF HIGH ENERGY PHYSICS, (2). doi:10.1007/JHEP02(2017)046
Dirac vs Majorana gauginos at a 100 TeV collider
di Cortona, G. G., Hardy, E., & Powell, A. J. (2016). Dirac vs Majorana gauginos at a 100 TeV collider. JOURNAL OF HIGH ENERGY PHYSICS, (8). doi:10.1007/JHEP08(2016)014
Diphotons from diaxions
Aparicio, L., Azatov, A., Hardy, E., & Romanino, A. (2016). Diphotons from diaxions. JOURNAL OF HIGH ENERGY PHYSICS, (5). doi:10.1007/JHEP05(2016)077
The Heterotic Superpotential and Moduli
de la Ossa, X., Hardy, E., & Svanes, E. E. (2016). The Heterotic Superpotential and Moduli. The Journal of High Energy Physics. doi:10.1007/JHEP01(2016)049
The QCD axion, precisely
Grilli di Cortona, G., Hardy, E., Pardo Vega, J., & Villadoro, G. (2016). The QCD axion, precisely. The Journal of High Energy Physics, 2016(1). doi:10.1007/JHEP01(2016)034
2015
The massless spectrum of heterotic compactifications
de la Ossa, X., Hardy, E., & Svanes, E. E. (2016). The massless spectrum of heterotic compactifications. FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS, 64(4-5), 365-+. doi:10.1002/prop.201500066
Electroweak relaxation from finite temperature
Hardy, E. (2015). Electroweak relaxation from finite temperature. JOURNAL OF HIGH ENERGY PHYSICS, (11). doi:10.1007/JHEP11(2015)077
Big Bang synthesis of nuclear dark matter
Hardy, E., Lasenby, R., March-Russell, J., & West, S. M. (2015). Big Bang synthesis of nuclear dark matter. The Journal of High Energy Physics. doi:10.1007/JHEP06(2015)011
Signatures of large composite Dark Matter states
Hardy, E., Lasenby, R., March-Russell, J., & West, S. M. (2015). Signatures of large composite Dark Matter states. JOURNAL OF HIGH ENERGY PHYSICS, (7). doi:10.1007/JHEP07(2015)133
2014
Annihilation signals from asymmetric dark matter
Hardy, E., Lasenby, R., & Unwin, J. (2014). Annihilation signals from asymmetric dark matter. JOURNAL OF HIGH ENERGY PHYSICS, 2014. doi:10.1007/JHEP07(2014)049
2013
Heavy superpartners with less tuning from hidden sector renormalisation
Hardy, E. (2014). Heavy superpartners with less tuning from hidden sector renormalisation. JOURNAL OF HIGH ENERGY PHYSICS, (3). doi:10.1007/JHEP03(2014)069
Searching for Fermi surfaces in super-QED
Cherman, A., Grozdanov, S., & Hardy, E. (2014). Searching for Fermi surfaces in super-QED. JOURNAL OF HIGH ENERGY PHYSICS, (6). doi:10.1007/JHEP06(2014)046
Is natural SUSY natural?
Hardy, E. (2013). Is natural SUSY natural?. JOURNAL OF HIGH ENERGY PHYSICS, (10). doi:10.1007/JHEP10(2013)133
Retrofitted natural supersymmetry from a U(1)
Hardy, E., & March-Russell, J. (2013). Retrofitted natural supersymmetry from a U(1). JOURNAL OF HIGH ENERGY PHYSICS, (5). doi:10.1007/JHEP05(2013)120
Axion mediation
Baryakhtar, M., Hardy, E., & March-Russell, J. (2013). Axion mediation. JOURNAL OF HIGH ENERGY PHYSICS, (7). doi:10.1007/JHEP07(2013)096
2012
Precision unification in λSUSY with a 125 GeV Higgs
Hardy, E., March-Russell, J., & Unwin, J. (2012). Precision unification in λSUSY with a 125 GeV Higgs. JOURNAL OF HIGH ENERGY PHYSICS, (10). doi:10.1007/JHEP10(2012)072