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arXiv · 1707.00745

Constraints on long-range spin-gravity and monopole-dipole couplings of the proton

Derek F. Jackson Kimball·Jordan Dudley·Yan Li·Dilan Patel·Julian Valdez
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Abstract

Results of a search for a long-range monopole-dipole coupling between the mass of the Earth and rubidium (Rb) nuclear spins are reported. The experiment simultaneously measures the spin precession frequencies of overlapping ensembles of $^{85}$Rb and $^{87}$Rb atoms contained within an evacuated, antirelaxation-coated vapor cell. The nuclear structure of the Rb isotopes makes the experiment particularly sensitive to spin-dependent interactions of the proton. The spin-dependent component of the gravitational energy of the proton in the Earth's field is found to be smaller than $3 \times 10^{-18}~{\rm eV}$, improving laboratory constraints on long-range monopole-dipole interactions by over three orders of magnitude.

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Derek F. Jackson Kimball, Jordan Dudley, Yan Li, Dilan Patel, Julian Valdez. 2017-07-03. Constraints on long-range spin-gravity and monopole-dipole couplings of the proton. https://doi.org/10.1103/physrevd.96.075004

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