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arXiv · 1508.02463

Short-range spin-dependent interactions of electrons: a probe for exotic pseudo-Goldstone bosons

W. A. Terrano·E. G. Adelberger·J. G. Lee·B. R. Heckel
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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 $m_{\rm b}\leq 500 \; \mu$eV and coupling strengths up to 14 orders of magnitude weaker than electromagnetism. This corresponds to symmetry-breaking scales $F \leq 70$ TeV, the highest reached in any laboratory experiment. We used an attractor with a 20-pole unpolarized mass distribution to improve laboratory bounds on $CP$-violating monopole-dipole interactions with $1.5\:\mu$eV$<m_{\rm b}<400\:\mu$eV by a factor of up to 1000.

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W. A. Terrano, E. G. Adelberger, J. G. Lee, B. R. Heckel. 2015-08-11. Short-range spin-dependent interactions of electrons: a probe for exotic pseudo-Goldstone bosons. https://arxiv.org/abs/1508.02463

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