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@ARTICLE{Adlarson:139088,
      author       = {Adlarson, P. and Augustyniak, W. and Bardan, W. and
                      Bashkanov, M. and Bergmann, F. S. and Berlowski, M. and
                      Bhatt, Himani and Bondar, A. and Büscher, Markus and Calen,
                      Hans and Ciepal, I. and Clement, H. and Coderre, Daniel and
                      Czerwinski, E. and Demmich, K. and Doroshkevich, E. and
                      Engels, Ralf W. and Erven, Wilhelm and Eyrich, W. and
                      Fedorets, Pavel and Föhl, K. and Fransson, K. and
                      Goldenbaum, Frank and Goslawski, P. and Goswami, Ankita and
                      Grigoryev, Kirill and Gullström, C. -O. and Hauenstein,
                      Florian and Heijkenskjöld, L. and Hejny, Volker and
                      Hinterberger, F. and Hodana, Malgorzata and Höistad, B. and
                      Jany, A. and Jany, Benedykt and Jarczyk, L. and Johansson,
                      T. and Kamys, B. and Kemmerling, Günter and Khan, Farha
                      Anjum and Khoukaz, A. and Kistryn, S. and Klaja, J. and
                      Kleines, Harald and Kirillov, D. A. and Klos, B. and Krapp,
                      M. and Krzemien, W. and Kulessa, Pawel and Kupsc, Andrzej
                      and Kuzmin, A. and Lalwani, K. and Lersch, Daniel and Li, L.
                      and Lorentz, Bernd and Magiera, A. and Maier, Rudolf and
                      Marciniewski, P. and Marianski, B. and Meißner, Ulf-G. and
                      Mikirtychyants, Maxim and Morsch, H. -P. and Moskal, Pawel
                      and Nandi, B. K. and Ohm, Henner and Ozerianska, I. and
                      Perez del Rio, E. and Piskunov, N. M. and Plucinski, P. and
                      Podkopal, P. and Prasuhn, Dieter and Pricking, A. and
                      Pszczel, D. and Pysz, K. and Pyszniak, A. and Redmer, F. and
                      Ritman, James and Roy, A. and Rudy, Z. and Sawant, S. and
                      Schadmand, Susan and Schmidt, A. and Sefzick, Thomas and
                      Serdyuk, Valeriy and Shah, N. and Shwartz, B. and Siemaszko,
                      M. and Siudak, R. and Skorodko, T. and Skruzok, M. and
                      Smyrski, J. and Sopov, V. and Stassen, Rolf and Stepaniak,
                      J. and Stephan, E. and Sterzenbach, Guenter and Stockhorst,
                      Hans and Stroeher, Hans and Szczurek, A. and Tolba, T. and
                      Trzcinski, A. and Varma, R. and Wagner, G. J. and Weglorz,
                      W. and Wirzba, Andreas and Wolke, Magnus and Wronska, A. and
                      Wüstner, Peter and Wurm, Patrick and Yamamoto, A. and
                      Zabierowski, J. and Zielinski, M. J. and Zipper, W. and
                      Zlomanczuk, J. and Zupranski, P. and Zurek, M.},
      title        = {{S}earch for a dark photon in the {P}i0 to e+e- {G}amma
                      decay},
      journal      = {Physics letters / B},
      volume       = {726},
      number       = {1-3},
      issn         = {0370-2693},
      address      = {Amsterdam},
      publisher    = {North-Holland Publ.},
      reportid     = {FZJ-2013-05103},
      pages        = {187 - 193},
      year         = {2013},
      note         = {*Temporary entry*},
      abstract     = {The presently world largest data sample of pi0 --> gamma
                      e+e- decays containing nearly 5E5 events was collected using
                      the WASA detector at COSY. A search for a dark photon U
                      produced in the pi0 --> gamma U --> gamma e+e- decay from
                      the $pp-->pp\pi^0$ reaction was carried out. An upper limit
                      on the square of the U-gamma mixing strength parameter
                      $epsilon^2$ of 5e-6 at $90\%$ CL was obtained for the mass
                      range 20 MeV $<M_U<$ 100 MeV. This result together with
                      other recent experimental limits significantly reduces the
                      $M_U$ vs. $\epsilon^2$ parameter space preferred by the
                      measured value of the muon anomalous magnetic moment.},
      keywords     = {p p: interaction (INSPIRE) / muon: magnetic moment
                      (INSPIRE) / photon: mixing (INSPIRE) / pi0: radiative decay
                      (INSPIRE) / Juelich COSY PS (INSPIRE) / U boson: search for
                      (INSPIRE) / electron positron: mass spectrum (INSPIRE) /
                      pi0: branching ratio: upper limit (INSPIRE) / experimental
                      results (INSPIRE) / WASA (INSPIRE) / p p --> 2p pi0
                      (INSPIRE) / pi0 --> positron electron photon (INSPIRE) / pi0
                      --> U boson photon (INSPIRE) / 0.55 GeV-kin (INSPIRE)},
      cin          = {IKP-1 / ZEA-2 / IAS-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IKP-1-20111104 / I:(DE-Juel1)ZEA-2-20090406 /
                      I:(DE-Juel1)IAS-4-20090406},
      pnm          = {531 - Hadron Structure and Dynamics (HSD) (POF2-531)},
      pid          = {G:(DE-HGF)POF2-531},
      experiment   = {EXP:(DE-Juel1)WASA-at-COSY-20170712},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {1304.0671},
      howpublished = {arXiv:1304.0671},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1304.0671;\%\%$},
      UT           = {WOS:000326482200021},
      doi          = {10.1016/j.physletb.2013.08.055},
      url          = {https://juser.fz-juelich.de/record/139088},
}