| Zugriffsnummer | 31473 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | New limit on Lorentz-invariance- and CPT-violating neutron spin interactions using a free-spin-precession 3He-129XE comagnetometer |
| Autor(in); Institution |
Allmendinger, F.; Universität Heidelberg, Heidelberg, GERMANY
Heil, W.; Institut für Physik, Johannes-Gutenberg-Universität Mainz, Mainz, GERMANY
Karpuk, S.; Institut für Physik, Johannes-Gutenberg-Universität Mainz, Mainz, GERMANY
Kilian, Wolfgang; 8.1, Medizinische Messtechnik, PTB-Berlin
Scharth, A.; Institut für Physik, Johannes-Gutenberg-Universität Mainz, Mainz, GERMANY
Schmidt, U.; Universität Heidelberg, Heidelberg, GERMANY
Schnabel, Allard; 8.2, Biosignale, PTB-Berlin
Sobolev, Yu.; Institut für Physik, Johannes-Gutenberg-Universität Mainz, Mainz, GERMANY
Tullney, K.; Institut für Physik, Johannes-Gutenberg-Universität Mainz, Mainz, GERMANY
|
| Quelle/Jahr | Physical Review Letters: 112 (2014), 11, 1 - 5 |
| Artikelnummer | 110801 |
| ISSN | 0031-9007 (PRINT) ; 1079-7114 (ONLINE) |
| DOI | |
| Verlag | Ridge, NY: American Physical Society |
| Klassifikationscode | PACS: 32.10.Dk ; PACS: 07.55.Ge ; PACS: 11.30.Cp ; PACS: 11.30.Er |
| Zusammenfassung | 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 b⊥n <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. |
Zitierung
Allmendinger, F., Heil, W., Karpuk, S., Kilian, W., Scharth, A., Schmidt, U., Schnabel, A., Sobolev, Y., & Tullney, K. (2014). New limit on Lorentz-invariance- and CPT-violating neutron spin interactions using a free-spin-precession ³He-¹²⁹XE comagnetometer. Physical Review Letters, 112(11), 1–5. https://doi.org/10.1103/physrevlett.112.110801