<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>CP</mml:mi></mml:math>-odd interaction of axion with matter

Pospelov, Maxim

doi:10.1103/physrevd.58.097703

Cited by 54 publications

(42 citation statements)

References 26 publications

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“…The scalar coupling with nuclei, g aN , is expected to be nonzero in the SM, because of the CP-violating contribution of the weak interactions [111,113,114], while experimental limits on the nEDM constrain it from above, g aN ≤ 10 −21 (f a /10 9 GeV) −1 . The axion dipole interaction with a fermion, g af , is defined by the interaction Lagrangian (2.1).…”

Section: C2 Ariadnementioning

confidence: 99%

Stellar recipes for axion hunters

Giannotti

Irastorza

Redondo

et al. 2017

J. Cosmol. Astropart. Phys.

262

371

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Abstract. There are a number of observational hints from astrophysics which point to the existence of stellar energy losses beyond the ones accounted for by neutrino emission. These excessive energy losses may be explained by the existence of a new sub-keV mass pseudoscalar Nambu-Goldstone boson with tiny couplings to photons, electrons, and nucleons. An attractive possibility is to identify this particle with the axion -the hypothetical pseudo Nambu-Goldstone boson predicted by the Peccei-Quinn solution to the strong CP problem. We explore this possibility in terms of a DFSZ-type axion and of a KSVZ-type axion/majoron, respectively. Both models allow a good global fit to the data, prefering an axion mass around 10 meV. We show that future axion experiments -the fifth force experiment ARIADNE and the helioscope IAXO -can attack the preferred mass range from the lower and higher end, respectively. An axion in this mass range can also be the main constituent of dark matter.

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Section: C2 Ariadnementioning

confidence: 99%

Stellar recipes for axion hunters

Giannotti

Irastorza

Redondo

et al. 2017

J. Cosmol. Astropart. Phys.

262

371

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“…Most notably, the QCD axion and other axion-like particles also have scalar couplings in the presence of CP violation, in addition to their usual pseudoscalar couplings. For the QCD axion there is a non-zero scalar coupling to the quarks [8][9][10]:…”

Section: Dilaton Couplings Of Dark Mattermentioning

confidence: 99%

Searching for dilaton dark matter with atomic clocks

2015

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We propose an experiment to search for ultralight scalar dark matter (DM) with dilatonic interactions. Such couplings can arise for the dilaton as well as for moduli and axion-like particles in the presence of CP violation. Ultralight dilaton DM acts as a background field that can cause tiny but coherent oscillations in Standard Model parameters such as the fine structure constant and the proton-electron mass ratio. These minute variations can be detected through precise frequency comparisons of atomic clocks. Our experiment extends current searches for drifts in fundamental constants to the well-motivated high-frequency regime. Our proposed setups can probe scalars lighter than 10 −15 eV with discovery potential of dilatonic couplings as weak as 10 −11 times the strength of gravity, improving current equivalence principle bounds by up to 8 orders of magnitude. We point out potential 10 4 sensitivity enhancements with future optical and nuclear clocks, as well as possible signatures in gravitational wave detectors. Finally, we discuss cosmological constraints and astrophysical hints of ultralight scalar DM, and show they are complimentary to and compatible with the parameter range accessible to our proposed laboratory experiments.

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“…The shaded band is the parameter space for the PQ axion with C f = 1. Additional uncertainties [14] and model dependence [15] can produce variations of this axion parameter space. Experimental as well as combined experimental and astrophysical bounds are also presented [9,11].…”

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confidence: 99%

Resonantly Detecting Axion-Mediated Forces with Nuclear Magnetic Resonance

2014

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We describe a method based on precision magnetometry that can extend the search for axionmediated spin-dependent forces by several orders of magnitude. By combining techniques used in nuclear magnetic resonance and short-distance tests of gravity, our approach can substantially improve upon current experimental limits set by astrophysics, and probe deep into the theoretically interesting regime for the Peccei-Quinn (PQ) axion. Our method is sensitive to PQ axion decay constants between 10 9 and 10 12 GeV or axion masses between 10 −6 and 10 −3 eV, independent of the cosmic axion abundance.

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CP-odd interaction of axion with matter

Cited by 54 publications

References 26 publications

Stellar recipes for axion hunters

Stellar recipes for axion hunters

Searching for dilaton dark matter with atomic clocks

Resonantly Detecting Axion-Mediated Forces with Nuclear Magnetic Resonance

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