Limits on New Long Range Nuclear Spin-Dependent Forces Set with a K-He-3 Comagnetometer

作者：Vasilakis G^*; Brown J M; Kornack T W; Romalis M V

来源：Physical Review Letters, 2009, 103(26): 261801.

DOI：10.1103/PhysRevLett.103.261801

A magnetometer using spin-polarized K and He-3 atoms occupying the same volume is used to search for anomalous nuclear spin-dependent forces generated by a separate He-3 spin source. We measure changes in the He-3 spin precession frequency with a resolution of 18 pHz and constrain anomalous spin forces between neutrons to be less than 2x10(-8) of their magnetic or less than 2x10(-3) of their gravitational interactions on a length scale of 50 cm. We present new limits on neutron coupling to light pseudoscalar and vector particles, including torsion, and constraints on recently proposed models involving unparticles and spontaneous breaking of Lorentz symmetry.

• 出版日期2009-12-31