Overview of the Cosmic Axion Spin Precession Experiment (CASPEr)

Kimball, Derek F. Jackson; Afach, S.; Aybas, Deniz; Blanchard, John W.; Budker, Dmitry; Centers, Gary P.; Engler, M.; Figueroa, Nataniel L.; Garcon, Antoine; Graham, Peter W.; Luo, Haibo; Rajendran, Surjeet; Sendra, M. G.; Sushkov, Alexander O.; Wang, T.; Wickenbrock, Arne; Wilzewski, Alexander; Wu, Teng

doi:10.48550/arxiv.1711.08999

Cited by 35 publications

(56 citation statements)

References 42 publications

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“…The partly European-based Cosmic Axion Spin Precession Experiment CASPEr collaboration runs a collection of experiments based on NMR technologies at the Helmholtz Institute Mainz (HIM) and at Boston University that, at least partly, may ultimately have the possibility to reach sensitivity to detect low mass DM axions with m a 1 neV [426]. Large regions of unexplored parameter space down to a mass of m a ∼10 −22 eV for ALPs are being explored and excluded by exploiting the search for DM ALP wind induced frequency shift in nuclear spins [427,428], or ALP induced oscillations of nuclear electric dipole moment [429]. Also, experiments to search for nEDM, like the search at Paul Scherrer Institut at Villigen in Switzerland (PSI) are sensitive to DM ALPs in a mass range 10 −22 eV − 10 −17 eV [430].…”

Section: Experiments For Low Mass Dark Matter Axions and Alpsmentioning

confidence: 99%

Direct Detection of Dark Matter -- APPEC Committee Report

Billard,

Boulay,

Cebrián

et al. 2021

Preprint

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This Report provides an extensive review of the experimental programme of direct detection searches of particle dark matter. It focuses mostly on European efforts, both current and planned, but does it within a broader context of a worldwide activity in the field. It aims at identifying the virtues, opportunities and challenges associated with the different experimental approaches and search techniques. It presents scientific and technological synergies, both existing and emerging, with some other areas of particle physics, notably collider and neutrino programmes, and beyond. It addresses the issue of infrastructure in light of the growing needs and challenges of the different experimental searches. Finally, the Report makes a number of recommendations from the perspective of a long-term future of the field. They are introduced, along with some justification, in the opening Overview and Recommendations section and are next summarised at the end of the Report. Overall, we recommend that the direct search for dark matter particle interactions with a detector target should be given top priority in astroparticle physics, and in all particle physics, and beyond, as a positive measurement will provide the most unambiguous confirmation of the particle nature of dark matter in the Universe.

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Section: Experiments For Low Mass Dark Matter Axions and Alpsmentioning

confidence: 99%

Direct Detection of Dark Matter -- APPEC Committee Report

Billard,

Boulay,

Cebrián

et al. 2021

Preprint

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“…Phase-II of the proposed CASPEr wind experiment [121], and a projection for the ARIADNE experiment [122,123]. ARIADNE would be sensitive to the product of g An and the CP-odd scalar coupling g s An (as in L CP−odd ⊃ −Ag s An Ψ n Ψ n ), and the region shown in Figure 4.4 is based on an optimistic choice of g s An = 10 −12 GeV/f A [19,122,124].…”

Section: Benchmark Pq Charged Fermionsmentioning

confidence: 99%

High-quality axions in solutions to the $μ$ problem

Bhattiprolu,

Martin

2021

Preprint

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Solutions to the µ problem in supersymmetry based on the Kim-Nilles mechanism naturally feature a Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) axion with decay constant of order the geometric mean of the Planck and TeV scales, consistent with astrophysical limits. We investigate minimal models of this type with two gauge-singlet fields that break a Peccei-Quinn symmetry, and extensions with extra vectorlike quark and lepton supermultiplets consistent with gauge coupling unification. We show that there are many anomaly-free discrete symmetries, depending on the vectorlike matter content, that protect the Peccei-Quinn symmetry to sufficiently high order to solve the strong CP problem. We study the axion couplings in this class of models. Models of this type that are automatically free of the domain wall problem require at least one pair of strongly interacting vectorlike multiplets with mass at the intermediate scale, and predict axion couplings that are greatly enhanced compared to the minimal supersymmetric DFSZ models, putting them within reach of proposed axion searches. Contents I. Introduction II. Peccei-Quinn charges, anomalies and axion couplings A. Axion properties in general B. Application to DFSZ axions in supersymmetry III. Discrete symmetries to protect U (1) PQ A. Conventions and assumptions for discrete symmetries B. Discrete non-R symmetries Z n C. Discrete R-symmetries Z R n D. Impact on baryon number and lepton number violation IV. Axion signals and detection prospects V. Conclusion References

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“…Magnetometers are popularly used in direct detections of the axion DM in the experiments of ABRACADABRA [62,63], and CASPEr [64][65][66][67]. In these cases, the induced magnetic field is along the direction of the DM velocity and the strength is time-varying.…”

Section: Introductionmentioning

confidence: 99%

Cosmic Axion Force

Kim,

Semertzidis

et al. 2021

Preprint

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Nambu-Goldstone bosons, or axions, may be ubiquitous. Some of the axions may have small masses and thus serve as mediators of long-range forces.In this paper, we study the force mediated by an extremely light axion, φ, between the visible sector and the dark sector, where dark matter lives. Since nature does not preserve the CP symmetry, the coupling between dark matter and φ is generically CP-violating. In this case, the induced force is extremely long-range and behaves as an effective magnetic field. If the force acts on electrons or nucleons, the spins of them on Earth precess around a fixed direction towards the galactic center. This provides an experimental opportunity for φ with mass, m φ , and decay constant, f φ , satisfying m φ 10 −25 eV, f φ 10 14 GeV if the daily modulation of the effective magnetic field signals in magnetometers is measured by using the coherent averaging method. The effective magnetic field induced by an axionic compact object, such as an axion domain wall, is also discussed.

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Overview of the Cosmic Axion Spin Precession Experiment (CASPEr)

Cited by 35 publications

References 42 publications

Direct Detection of Dark Matter -- APPEC Committee Report

Direct Detection of Dark Matter -- APPEC Committee Report

High-quality axions in solutions to the $μ$ problem

Cosmic Axion Force

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