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@INPROCEEDINGS{Payez:295200,
      author       = {Payez, A. and Cudell, J. R. and Hutsemekers, D.},
      title        = {{N}ew constraints on very light pseudoscalars},
      address      = {Hamburg},
      publisher    = {Deutsches Elektronen-Synchrotron, DESY},
      reportid     = {PUBDB-2016-01116, arXiv:1204.6614},
      pages        = {147-150},
      year         = {2011},
      abstract     = {Nearly massless axion-like particles are of interest for
                      astrophysical observations, and some constraints on their
                      parameter space do exist in the literature. Here, we propose
                      to put new constraints on these particles using polarisation
                      and, in particular, the polarisation differences observed
                      between different quasar classes.},
      month         = {Jun},
      date          = {2011-06-27},
      organization  = {7th Patras Workshop on Axions, WIMPs
                       and WISPs, Mykonos (Greece), 27 Jun
                       2011 - 1 Jul 2011},
      keywords     = {talk (INSPIRE) / polarization (INSPIRE) / quasar (INSPIRE)
                      / axion (INSPIRE) / WIMP (INSPIRE) / WISP (INSPIRE)},
      cin          = {L},
      cid          = {I:(DE-H253)L-20120731},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      experiment   = {EXP:(DE-H253)HERA(machine)-20150101},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)15},
      eprint       = {1204.6614},
      howpublished = {arXiv:1204.6614},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1204.6614;\%\%$},
      doi          = {10.3204/DESY-PROC-2011-04/payez_alexandre},
      url          = {https://bib-pubdb1.desy.de/record/295200},
}