Limits on Exotic Long-Range Spin-Spin Interactions of Electrons

作者：Heckel B R^*; Terrano W A; Adelberger E G

来源：Physical Review Letters, 2013, 111(15): 151802.

DOI：10.1103/PhysRevLett.111.151802

We surrounded a rotating torsion pendulum containing 9.8 x 10(22) polarized electrons by 2 or 4 stationary sources, each with a net spin of 6.0 x 10(24) polarized electrons. Multiple source configurations gave sensitivity to hypothetical dipole-dipole, spin-dot-spin, and spin-cross-spin exchange interactions mediated by bosons with masses up to 20 mu eV. For bosons with masses <= 0.1 mu eV our null results for the dipole-dipole, spin-dot-spin, and spin-cross-spin forces imply 1 sigma upper limits on (g(P)(e))(2)/((h) over barc), (g(A)(e))(2)/((h) over barc) and (g(V)(e)g(A)(e))/((h) over barc) of 2.2 x 10(-16), 3.8 x 10(-40), and 1.2 x 10(-28), respectively. We also constrain, for the first time, any possible linear combination of static spin-spin interactions. In this case our upper limits relax to 5.6 x 10(-16), 9.8 x 10(-40), and 1.2 x 10(-28), respectively.

• 出版日期2013-10-10