Improved Limits on Spin-Mass Interactions.

@article{Lee2018ImprovedLO,
title={Improved Limits on Spin-Mass Interactions.},
author={Junyi Lee and Attaallah Almasi and Michael V. Romalis},
journal={Physical review letters},
year={2018},
volume={120 16},
pages={
161801
}
}
• Published 9 January 2018
• Physics
• Physical review letters
Very light particles with CP-violating couplings to ordinary matter, such as axions or axionlike particles, can mediate long-range forces between polarized and unpolarized fermions. We describe a new experimental search for such forces between unpolarized nucleons in two 250 kg Pb weights and polarized neutrons and electrons in a ^{3}He-K comagnetometer located about 15 cm away. We place improved constraints on the products of scalar and pseudoscalar coupling constants, g_{p}^{n}g_{s}^{N}<4.2…

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References

SHOWING 1-10 OF 57 REFERENCES
Limits on Spin-Mass Couplings within the Axion Window.
• Physics
Physical review letters
• 1996
The observations limit the size of a possible monopole-dipole interaction expected to be produced by a pseudoscalar particle such as the axion, approximately 3 (4) orders of magnitude better than earlier experiments.
New exclusion limits on scalar and pseudoscalar axionlike particles from light shining through a wall
• Physics
• 2015
Physics beyond the Standard Model predicts the possible existence of new particles that can be searched at the low-energy frontier in the sub-eV range. The OSQAR photon regeneration experiment looks
Constraints on spin-dependent short-range interaction between nucleons.
• Physics
Physical review letters
• 2013
An ultrasensitive low-field magnetometer based on the detection of free precession of colocated 3He and 129Xe nuclear spins is employed using SQUIDs as low-noise magnetic flux detectors to search for a spin-dependent P- and T-violating nucleon-nucleon interaction mediated by light pseudoscalar bosons.
Limits on a CP-violating scalar axion-nucleon interaction
Axions or similar hypothetical pseudoscalar bosons may have a small CP-violating scalar Yukawa interaction g_s(N) with nucleons, causing macroscopic monopole-dipole forces. Torsion-balance
Preferred-Frame and CP-Violation Tests with Polarized Electrons
• Physics
• 2007
We used a torsion pendulum containing {approx_equal}10{sup 23} polarized electrons to search new interactions that couple to electron spin. We limit CP-violating interactions between the pendulum's
New CAST Limit on the Axion-Photon Interaction
• Physics
• 2017
During 2003--2015, the CERN Axion Solar Telescope (CAST) has searched for $a\to\gamma$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. In
Axions and the Strong CP Problem
• Physics
• 2010
Current upper bounds on the neutron electric dipole moment constrain the physically observable quantum chromodynamic (QCD) vacuum angle
New limit on Lorentz- and CPT-violating neutron spin interactions.
• Physics
Physical review letters
• 2010
This measurement represents the highest energy resolution of any spin anisotropy experiment and improves on the previous limit by a factor of 30.
Microwave cavity searches for dark-matter axions
• Physics
• 2003
Recent determinations of cosmological parameters point to a flat Universe, whose total energy density is composed of about two-thirds vacuum energy and one-third matter. Ordinary baryonic matter is