Abstract
We used a torsion pendulum and rotating attractor with 20-pole electron-spin distributions to probe dipole-dipole interactions mediated by exotic pseudo-Goldstone bosons with and coupling strengths up to 14 orders of magnitude weaker than electromagnetism. This corresponds to symmetry-breaking scales , the highest reached in any laboratory experiment. We used an attractor with a 20-pole unpolarized mass distribution to improve laboratory bounds on -violating monopole-dipole forces with by up to a factor of 1000.
- Received 3 August 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.201801
© 2015 American Physical Society