New Limit on Lorentz- and CPT-Violating Neutron Spin Interactions
Abstract
We performed a search for neutron spin coupling to a Lorentz- and CPT-violating background field using a magnetometer with overlapping ensembles of K and He3 atoms. The comagnetometer is mounted on a rotary platform for frequent reversal of its orientation. We measure sidereal oscillations in the signal to search for anomalous spin coupling of extra-solar origin. We determine the equatorial components of the background field interacting with the neutron spin to be b∼Xn=(0.1±1.6)×10-33GeV and b∼Yn=(2.5±1.6)×10-33GeV, improving on the previous limit by a factor of 30. This measurement represents the highest energy resolution of any spin anisotropy experiment.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 2010
- DOI:
- 10.1103/PhysRevLett.105.151604
- arXiv:
- arXiv:1006.5425
- Bibcode:
- 2010PhRvL.105o1604B
- Keywords:
-
- 11.30.Cp;
- 11.30.Er;
- 21.30.Cb;
- 32.30.Dx;
- Lorentz and Poincare invariance;
- Charge conjugation parity time reversal and other discrete symmetries;
- Nuclear forces in vacuum;
- Magnetic resonance spectra;
- Physics - Atomic Physics;
- High Energy Physics - Phenomenology
- E-Print:
- Phys.Rev.Lett.105:151604,2010