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@INPROCEEDINGS{Wunderle:291432,
      author       = {Wunderle, Alexander and Zimmer, Oliver and Virot, Romain
                      and Theroine, Camille and Soldner, Torsten and Simson,
                      Martin and Schmidt, Christian and Maisonobe, Romain and
                      Konrad, Gertrud and Heil, Werner and Glück, Ferenc and
                      Beck, Marcus and Baeßler, Stefan},
      title        = {{L}atest results from the $a${SPECT} experiment},
      address      = {Hamburg},
      publisher    = {Deutsches Elektronen-Synchrotron, DESY},
      reportid     = {PUBDB-2015-05404, DESY-PROC-2014-04},
      pages        = {452-455},
      year         = {2014},
      abstract     = {The $a$SPECT retardation spectrometer measures the $\beta -
                      \bar{\nu}_e$ angular correlation coefficient \textit{a} in
                      the $\beta$-decay of the free neutron.This measurement can
                      be used to determine the ratio $\lambda = \frac{g_A}{g_V}$
                      of the weak coupling constants, as well as to search for
                      physics beyond the standard electroweak model. In
                      spring/summer 2013 \textit{a}SPECT had a successful beam
                      time at the Institut Laue-Langevin (ILL), Grenoble/France.
                      The goal of this beam time is to improve the current
                      uncertainty of \textit{a} from $\frac{\Delta a}{a} \sim
                      5\\%$ to about 1\\%. To achieve this goal the systematic
                      uncertainties of \textit{a}SPECT have to be understood
                      accordingly. This is achieved via systematic tests,
                      measurements of \textit{a} with different systematic
                      parameter settings during the beam time and measurements
                      afterwards, like the work-function fluctuations of
                      electrodes or the magnetic field ratio of our spectrometer.
                      Sophisticated simulations of our spectrometer are used to
                      understand and reduce the systematic uncertainties further.},
      month         = {Aug},
      date          = {2014-08-25},
      organization  = {Panic2014, Hamburg (Germany), 25 Aug
                       2014 - 29 Aug 2014},
      keywords     = {electroweak interaction: model (autogen) / spectrometer
                      (autogen) / angular correlation (autogen) / magnetic field
                      (autogen) / weak coupling (autogen) / fluctuation (autogen)
                      / electrode (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)8 / PUB:(DE-HGF)15},
      doi          = {10.3204/DESY-PROC-2014-04/72},
      url          = {https://bib-pubdb1.desy.de/record/291432},
}