Cover Image

New limit on Lorentz-invariance- and CPT-violating neutron spin interactions using a free-spin-precession 3He-129Xe Comagnetometer

We report on the search for a CPT- and Lorentz-invariance-violating coupling of the 3He and 129Xe nuclear spins (each largely determined by a valence neutron) to posited background tensor fields that permeate the Universe. Our experimental approach is to measure the free precession of nuclear spin p...

Full description

Saved in:
Bibliographic Details
Main Authors: Allmendinger, Fabian (Author) , Heil, W. (Author) , Karpuk, S. (Author) , Kilian, W. (Author) , Scharth, A. (Author) , Schmidt, Ulrich (Author) , Schnabel, A. (Author) , Sobolev, Yu. (Author) , Tullney, K. (Author)
Format: Article (Journal)
Language:English
Published: 17 March 2014
In: Physical review letters
Year: 2014, Volume: 112, Issue: 11
ISSN:1079-7114
DOI:10.1103/PhysRevLett.112.110801
Online Access:Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.112.110801
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.112.110801
Get full text
Author Notes:F. Allmendinger, W. Heil, S. Karpuk, W. Kilian, A. Scharth, U. Schmidt, A. Schnabel, Yu. Sobolev, and K. Tullney
Description
Summary:We report on the search for a CPT- and Lorentz-invariance-violating coupling of the 3He and 129Xe nuclear spins (each largely determined by a valence neutron) to posited background tensor fields that permeate the Universe. Our experimental approach is to measure the free precession of nuclear spin polarized 3He and 129Xe atoms in a homogeneous magnetic guiding field of about 400 nT using LTC SQUIDs as low-noise magnetic flux detectors. As the laboratory reference frame rotates with respect to distant stars, we look for a sidereal modulation of the Larmor frequencies of the colocated spin samples. As a result we obtain an upper limit on the equatorial component of the background field interacting with the spin of the bound neutron ˜bn⊥<8.4×10−34 GeV (68% C.L.). Our result improves our previous limit (data measured in 2009) by a factor of 30 and the world’s best limit by a factor of 4.
Item Description:Im Titel sind die Zahlen 3 und 129 hochgestellt
Gesehen am 09.09.2020
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.112.110801

Similar Items