Search for galactic axions with a traveling wave parametric amplifier

Di Vora, R.; Lombardi, A.; Ortolan, A.; Pengo, R.; Ruoso, G.; Braggio, C.; Carugno, G.; Taffarello, L.; Cappelli, G.; Crescini, N.; Esposito, M.; Planat, L.; Ranadive, A.; Roch, N.; Alesini, D.; Babusci, D.; D’Elia, A.; Di Gioacchino, D.; Gatti, C.; Ligi, C.; Maccarrone, G.; Rettaroli, A.; Tocci, S.; D’Agostino, D.; Gambardella, U.; Iannone, G.; Falferi, P.; ,

doi:10.1103/physrevd.108.062005

Phys. Rev. D

2023

DOI: 10.1103/physrevd.108.062005

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Search for galactic axions with a traveling wave parametric amplifier

R. Di Vora,

A. Lombardi,

A. Ortolan

et al.

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Cited by 11 publications

References 58 publications

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A light QCD axion with hilltop misalignment

Co,

Gherghetta,

Liu

et al. 2024

J. High Energ. Phys.

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We study the cosmological evolution of a light QCD axion and identify the parameter space to obtain the correct relic dark matter abundance. The axion potential is flattened at the origin, corresponding to the only minimum, while it is unsuppressed at π. These potential features arise by assuming a mirror sector with the strong CP phase $$ \overline{\theta} $$ θ ¯ shifted by π compared to the SM sector, which allows the mirror axion potential to be tuned against the usual QCD axion potential. Before the QCD phase transition, assuming the mirror sector is decoupled and much colder than the SM thermal bath, the mirror sector potential dominates, causing the axion to initially roll to a temporary minimum at π. However, after the QCD phase transition, the potential minimum changes, and the axion relaxes from the newly created “hilltop” near π to the CP-conserving minimum at the origin. As the axion adiabatically tracks this shift in the potential minimum through the QCD phase transition, with non-adiabatic evolution near π and 0, it alters the usual prediction of the dark matter abundance. Consequently, this “hilltop” misalignment mechanism opens new regions of axion parameter space, with the correct relic abundance while still solving the strong CP problem, that could be explored in future experiments.

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A light QCD axion with hilltop misalignment

Co,

Gherghetta,

Liu

et al. 2024

J. High Energ. Phys.

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The future search for low-frequency axions and new physics with the FLASH resonant cavity experiment at Frascati National Laboratories

Alesini,

Babusci,

Beltrame

et al. 2023

Physics of the Dark Universe

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Novel two-qubit microwave photon detector for fundamental physics applications

Rettaroli,

Banchi,

Corti

et al. 2025

Nuclear Instruments and Methods in Physics Research Section A:

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Search for galactic axions with a traveling wave parametric amplifier

Cited by 11 publications

References 58 publications

A light QCD axion with hilltop misalignment

A light QCD axion with hilltop misalignment

The future search for low-frequency axions and new physics with the FLASH resonant cavity experiment at Frascati National Laboratories

Novel two-qubit microwave photon detector for fundamental physics applications

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