%0 Journal Article
%A Adlarson, P.
%A Augustyniak, W.
%A Bardan, W.
%A Bashkanov, M.
%A Bergmann, F. S.
%A Berlowski, M.
%A Bhatt, Himani
%A Bondar, A.
%A Büscher, Markus
%A Calen, Hans
%A Ciepal, I.
%A Clement, H.
%A Coderre, Daniel
%A Czerwinski, E.
%A Demmich, K.
%A Doroshkevich, E.
%A Engels, Ralf W.
%A Erven, Wilhelm
%A Eyrich, W.
%A Fedorets, Pavel
%A Föhl, K.
%A Fransson, K.
%A Goldenbaum, Frank
%A Goslawski, P.
%A Goswami, Ankita
%A Grigoryev, Kirill
%A Gullström, C. -O.
%A Hauenstein, Florian
%A Heijkenskjöld, L.
%A Hejny, Volker
%A Hinterberger, F.
%A Hodana, Malgorzata
%A Höistad, B.
%A Jany, A.
%A Jany, Benedykt
%A Jarczyk, L.
%A Johansson, T.
%A Kamys, B.
%A Kemmerling, Günter
%A Khan, Farha Anjum
%A Khoukaz, A.
%A Kistryn, S.
%A Klaja, J.
%A Kleines, Harald
%A Kirillov, D. A.
%A Klos, B.
%A Krapp, M.
%A Krzemien, W.
%A Kulessa, Pawel
%A Kupsc, Andrzej
%A Kuzmin, A.
%A Lalwani, K.
%A Lersch, Daniel
%A Li, L.
%A Lorentz, Bernd
%A Magiera, A.
%A Maier, Rudolf
%A Marciniewski, P.
%A Marianski, B.
%A Meißner, Ulf-G.
%A Mikirtychyants, Maxim
%A Morsch, H. -P.
%A Moskal, Pawel
%A Nandi, B. K.
%A Ohm, Henner
%A Ozerianska, I.
%A Perez del Rio, E.
%A Piskunov, N. M.
%A Plucinski, P.
%A Podkopal, P.
%A Prasuhn, Dieter
%A Pricking, A.
%A Pszczel, D.
%A Pysz, K.
%A Pyszniak, A.
%A Redmer, F.
%A Ritman, James
%A Roy, A.
%A Rudy, Z.
%A Sawant, S.
%A Schadmand, Susan
%A Schmidt, A.
%A Sefzick, Thomas
%A Serdyuk, Valeriy
%A Shah, N.
%A Shwartz, B.
%A Siemaszko, M.
%A Siudak, R.
%A Skorodko, T.
%A Skruzok, M.
%A Smyrski, J.
%A Sopov, V.
%A Stassen, Rolf
%A Stepaniak, J.
%A Stephan, E.
%A Sterzenbach, Guenter
%A Stockhorst, Hans
%A Stroeher, Hans
%A Szczurek, A.
%A Tolba, T.
%A Trzcinski, A.
%A Varma, R.
%A Wagner, G. J.
%A Weglorz, W.
%A Wirzba, Andreas
%A Wolke, Magnus
%A Wronska, A.
%A Wüstner, Peter
%A Wurm, Patrick
%A Yamamoto, A.
%A Zabierowski, J.
%A Zielinski, M. J.
%A Zipper, W.
%A Zlomanczuk, J.
%A Zupranski, P.
%A Zurek, M.
%T Search for a dark photon in the Pi0 to e+e- Gamma decay
%J Physics letters / B
%V 726
%N 1-3
%@ 0370-2693
%C Amsterdam
%I North-Holland Publ.
%M FZJ-2013-05103
%P 187 - 193
%D 2013
%Z *Temporary entry*
%X 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.
%K p p: interaction (INSPIRE)
%K muon: magnetic moment (INSPIRE)
%K photon: mixing (INSPIRE)
%K pi0: radiative decay (INSPIRE)
%K Juelich COSY PS (INSPIRE)
%K U boson: search for (INSPIRE)
%K electron positron: mass spectrum (INSPIRE)
%K pi0: branching ratio: upper limit (INSPIRE)
%K experimental results (INSPIRE)
%K WASA (INSPIRE)
%K p p --> 2p pi0 (INSPIRE)
%K pi0 --> positron electron photon (INSPIRE)
%K pi0 --> U boson photon (INSPIRE)
%K 0.55 GeV-kin (INSPIRE)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000326482200021
%R 10.1016/j.physletb.2013.08.055
%U https://juser.fz-juelich.de/record/139088