Short-Range, Spin-Dependent Interactions of Electrons: A Probe for Exotic Pseudo-Goldstone Bosons

W. A. Terrano, E. G. Adelberger, J. G. Lee, and B. R. Heckel
Phys. Rev. Lett. 115, 201801 – Published 9 November 2015

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 mbc2500μeV and coupling strengths up to 14 orders of magnitude weaker than electromagnetism. This corresponds to symmetry-breaking scales F70TeV, 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 forces with 1.5μeV<mbc2<400μeV by up to a factor of 1000.

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  • Received 3 August 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.201801

© 2015 American Physical Society

Authors & Affiliations

W. A. Terrano, E. G. Adelberger, J. G. Lee, and B. R. Heckel

  • Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290, USA

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Issue

Vol. 115, Iss. 20 — 13 November 2015

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