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...
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| Main Authors: | , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
17 March 2014
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| 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 
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| Author Notes: | F. Allmendinger, W. Heil, S. Karpuk, W. Kilian, A. Scharth, U. Schmidt, A. Schnabel, Yu. Sobolev, and K. Tullney |
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| 245 | 1 | 0 | |a New limit on Lorentz-invariance- and CPT-violating neutron spin interactions using a free-spin-precession 3He-129Xe Comagnetometer |c F. Allmendinger, W. Heil, S. Karpuk, W. Kilian, A. Scharth, U. Schmidt, A. Schnabel, Yu. Sobolev, and K. Tullney |
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| 520 | |a 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. | ||
| 700 | 1 | |a Heil, W. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Karpuk, S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kilian, W. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Scharth, A. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Schnabel, A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Sobolev, Yu. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Tullney, K. |e VerfasserIn |4 aut | |
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