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@INPROCEEDINGS{Allmendinger:291438,
      author       = {Allmendinger, Fabian and Schmidt, Ulrich and Heil, Werner
                      and Karpuk, Sergei and Sobolev, Yury and Tullney, Kathlynne},
      title        = {{L}imit on {L}orentz-{I}nvariance- and {CPT}-{V}iolating
                      {N}eutron {S}pin {I}nteractions {U}sing a $\mathrm{^3
                      {H}e-^{129}{X}e}$ {C}omagnetometer},
      address      = {Hamburg},
      publisher    = {Deutsches Elektronen-Synchrotron, DESY},
      reportid     = {PUBDB-2015-05410, DESY-PROC-2014-04},
      pages        = {456-459},
      year         = {2014},
      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.},
      month         = {Aug},
      date          = {2014-08-25},
      organization  = {Panic2014, Hamburg (Germany), 25 Aug
                       2014 - 29 Aug 2014},
      keywords     = {nucleus: spin (autogen) / spin: interaction (autogen) /
                      spin: anisotropy (autogen) / n: spin (autogen) / background
                      field (autogen) / modulation (autogen) / precession
                      (autogen) / atom (autogen) / star (autogen)},
      cin          = {ATLAS / CMS / UNI/EXP},
      cid          = {I:(DE-H253)ATLAS-20120731 / I:(DE-H253)CMS-20120731 /
                      $I:(DE-H253)UNI_EXP-20120731$},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611)},
      pid          = {G:(DE-HGF)POF3-611},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)29 / PUB:(DE-HGF)8},
      doi          = {10.3204/DESY-PROC-2014-04/41},
      url          = {https://bib-pubdb1.desy.de/record/291438},
}