Bound on Lorentz and CPT violating boost effects for the neutron.
A search for an annual variation of a daily sidereal modulation of the frequency difference between colocated 129Xe and 3He Zeeman masers sets a stringent limit on boost-dependent Lorentz and CPT violation involving the neutron, consistent with no effect at the level of 150 nHz. In the framework of the general standard-model extension, the present result provides the first clean test for the fermion sector of the symmetry of spacetime under boost transformations at a level of 10(-27) GeV.
Canè
F
F
Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.
Bear
D
D
Phillips
D F
DF
Rosen
M S
MS
Smallwood
C L
CL
Stoner
R E
RE
Walsworth
R L
RL
Kostelecký
V Alan
VA