Storage Ring Probes of Dark Matter and Dark Energy

Graham, Peter W.; Haciomeroglu, Selcuk; Kaplan, David E.; Omarov, Zhanibek; Rajendran, Surjeet; Semertzidis, Yannis K.

doi:10.48550/arxiv.2005.11867

Cited by 7 publications

(10 citation statements)

References 36 publications

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“…Figure 9: Axion-neutron coupling vs. axion mass. Axion limits readapted from [79] include: axion DM experiments (blue) [99][100][101][102][103] and astrophysical bounds (green) [104,105]. Projected sensitivities appear in translucent colors, delimited by dashed lines.…”

Section: Axion Coupling To Electronsmentioning

confidence: 99%

Dark matter from an even lighter QCD axion: trapped misalignment

Di Luzio,

Gavela,

Quilez

et al. 2021

Preprint

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We show that dark matter can be accounted for by an axion that solves the strong CP problem, but is much lighter than usual due to a Z N symmetry. The whole mass range from the canonical QCD axion down to the ultra-light regime is allowed, with 3 ≤ N 65. This includes the first proposal of a "fuzzy dark matter" QCD axion with m a ∼ 10 −22 eV. A novel misalignment mechanism occurs -trapped misalignment-due to the peculiar temperature dependence of the Z N axion potential. The dark matter relic density is enhanced because the axion field undergoes two stages of oscillations: it is first trapped in the wrong minimum, which effectively delays the onset of true oscillations. Trapped misalignment is more general than the setup discussed here, and may hold whenever an extra source of Peccei-Quinn breaking appears at high temperatures. Furthermore, it will be shown that trapped misalignment can dynamically source the recently proposed kinetic misalignment mechanism. All the parameter space is within tantalizing reach of the experimental projects for the next decades. For instance, even Phase I of CASPEr-Electric could discover this axion.

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Section: Axion Coupling To Electronsmentioning

confidence: 99%

Dark matter from an even lighter QCD axion: trapped misalignment

Di Luzio,

Gavela,

Quilez

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…1 (b), including experimental sensitivities and the predicted coupling for ALP DM and QCD axion with c q /N DW = 1, 10 2 , 10 4 . The relevant experiments are CASPEr Wind [58], comagnetometers [59], and proton storage ring [60]. They measure the axion DM-induced effective magnetic field which is proportional to…”

Section: Non-gravitational Probesmentioning

confidence: 99%

Recent Progress in the Physics of Axions and Axion-Like Particles

Choi,

Im,

Shin

2020

Preprint

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In recent years, there have been remarkable progresses in physics of axions in several different directions. An unusual type of axion-like particle called the relaxion was proposed as a new solution to the weak scale hierarchy problem. There are also new ideas for laboratory, astrophysical, or cosmological search for axions, which can probe wide range of model parameters that were not accessible before. In formal theory side, the weak gravity conjecture indicates a potential tension between quantum gravity and large axion field excursion which might be necessary for the axion inflation or the cosmological relaxation of the weak scale by the relaxion. Many of these developments involve axions with hierarchical couplings, thus motivate model-building attempts to generate the necessary coupling hierarchies in low energy effective theory. In this paper, we review the recent progresses in axion physics with the focus on the subjects related to axion coupling hierarchies and the prospect for detecting their observational signatures.

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“…Finally, we should say that in our work we do not assume that axions make up dark matter. Under that assumption additional searches are possible with interesting signatures, including oscillating EDMs [33][34][35][36][37][38], which can be searched for in a wide range of experiments [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

CP-violating axion interactions in effective field theory

Dekens,

de Vries,

Shain

2022

Preprint

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Axions are introduced to explain the observed smallness of the θ term of QCD. Standard Model extensions typically contain new sources of CP violation, for instance to account for the baryon asymmetry of the universe. In the presence of additional CP-violating sources a Peccei-Quinn mechanism does not remove all CP violation, leading to CP-odd interactions among axions and Standard Model fields. In this work, we use effective field theory to parametrize generic sources of beyond-the-Standard-Model CP violation. We systematically compute the resulting CP-odd couplings of axions to leptons and hadrons by using chiral perturbation theory. We discuss in detail the phenomenology of the CP-odd axion couplings and compare limits from axion searches, such as fifth force and monopole-dipole searches and astrophysics, to direct limits on the CP-violating operators from electric dipole moment experiments. While limits from electric dipole moment searches are tight, the proposed ARIADNE experiment can potentially improve the existing constraints in a window of axion masses.

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Storage Ring Probes of Dark Matter and Dark Energy

Cited by 7 publications

References 36 publications

Dark matter from an even lighter QCD axion: trapped misalignment

Dark matter from an even lighter QCD axion: trapped misalignment

Recent Progress in the Physics of Axions and Axion-Like Particles

CP-violating axion interactions in effective field theory

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