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

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 $3\times 10^{-18}\mathrm{eV}$, improving laboratory constraints on long-range monopole-dipole interactions by over three orders of magnitude.

10 pages, 8 figures

References in corpus (12)

• Cosmology and the Fate of Dilatation Symmetry
• New limit on Lorentz and CPT-violating neutron spin interactions
• Spin-Dependent Macroscopic Forces from New Particle Exchange
• Constraints on Torsion from Lorentz Violation
• Preferred-Frame and CP-Violation Tests with Polarized Electrons
• Limits on a CP-violating scalar axion-nucleon interaction
• New classes of systematic effects in gas spin co-magnetometers
• Influence of magnetic-field inhomogeneity on nonlinear magneto-optical resonances
• Laboratory Search for Spin-dependent Short-range Force from Axion-Like-Particles using Optically Polarized 3He gas
• Nonlinear magneto-optical rotation with modulated light in tilted magnetic fields
• Magnetometric sensitivity optimization for nonlinear optical rotation with frequency-modulated light: rubidium D2 line
• In-situ measurement of light polarization with ellipticity-induced nonlinear magneto-optical rotation