Report/Contribution to a conference proceedings

PUBDB-2015-05410

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Limit on Lorentz-Invariance- and CPT-Violating Neutron Spin Interactions Using a $\mathrm{^3 He-^{129}Xe}$ Comagnetometer

Allmendinger, F. ; Schmidt, U. ; Heil, W. ; Karpuk, S. ; Sobolev, Y. ; Tullney, K.

2014
Deutsches Elektronen-Synchrotron, DESY Hamburg

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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2014-04/41  doi:10.3204/DESY-PROC-2014-04/41

Report No.: DESY-PROC-2014-04

Abstract: We performed a search for a Lorentz-invariance- and CPT-violating coupling of the $^3$He and $^{129}$Xe nuclear spins to posited background fields. Our experimental approach is to measure the free precession of nuclear spin polarized $^3$He and $^{129}$Xe atoms using SQUIDs as detectors. As the laboratory reference frame rotates with respect to distant stars, we look for a sidereal modulation of the Larmor frequencies of the co-located spin samples. As a result we obtain an upper limit on the equatorial component of the background field $\tilde{b}^n_{\bot}< 8.4 \cdot 10^{-34}$ GeV (68\% C.L.). This experiment is currently the most precise test of spin anisotropy due to the excellent long spin-coherence time.

Keyword(s): nucleus: spin ; spin: interaction ; spin: anisotropy ; n: spin ; background field ; modulation ; precession ; atom ; star

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Contributing Institute(s):

1. LHC/ATLAS Experiment (ATLAS)
2. LHC/CMS Experiment (CMS)
3. Uni Hamburg / Experimentalphysik (UNI/EXP)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. No specific instrument

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Database coverage:

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Book/Proceedings/Internal Report Schmidt, A. (Editor)>Extern* ; Sander, C. (Editor)DESY*
Proceedings, 20th International Conference on Particles and Nuclei (PANIC 14)
2014Panic2014, Panic2014, HamburgHamburg, Germany, 25 Aug 2014 - 29 Aug 20142014-08-252014-08-29 Hamburg : Deutsches Elektronen-Synchrotron, DESY 1-754 (2014) [10.3204/DESY-PROC-2014-04]2014     Files  Fulltext BibTeX | EndNote: XML, Text | RIS

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