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@ARTICLE{Adlarson:856093,
      author       = {Adlarson, P. and Augustyniak, W. and Bardan, W. and
                      Bashkanov, M. and Bass, S. D. and Bergmann, F. S. and
                      Berłowski, M. and Bondar, A. and Büscher, M. and Calén,
                      H. and Ciepał, I. and Clement, H. and Czerwiński, E. and
                      Demmich, K. and Engels, R. and Erven, A. and Erven, W. and
                      Eyrich, W. and Fedorets, P. and Föhl, K. and Fransson, K.
                      and Goldenbaum, F. and Goswami, A. and Grigoryev, K. and
                      Gullström, C.-O. and Heijkenskjöld, L. and Hejny, V. and
                      Hüsken, N. and Jarczyk, L. and Johansson, T. and Kamys, B.
                      and Kemmerling, G. and Khatri, G. and Khoukaz, A. and
                      Khreptak, O. and Kirillov, D. A. and Kistryn, S. and
                      Kleines, H. and Kłos, B. and Krzemień, W. and Kulessa, P.
                      and Kupść, A. and Kuzmin, A. and Lalwani, K. and Lersch,
                      D. and Lorentz, B. and Magiera, A. and Maier, R. and
                      Marciniewski, P. and Mariański, B. and Morsch, H.-P. and
                      Moskal, P. and Ohm, H. and Parol, W. and Perez del Rio, E.
                      and Piskunov, N. M. and Prasuhn, D. and Pszczel, D. and
                      Pysz, K. and Pyszniak, A. and Ritman, J. and Roy, A. and
                      Rudy, Z. and Rundel, O. and Sawant, S. and Schadmand, S. and
                      Schätti-Ozerianska, I. and Sefzick, T. and Serdyuk, V. and
                      Shwartz, B. and Sitterberg, K. and Skorodko, T. and Skurzok,
                      M. and Smyrski, J. and Sopov, V. and Stassen, R. and
                      Stepaniak, J. and Stephan, E. and Sterzenbach, G. and
                      Stockhorst, H. and Ströher, H. and Szczurek, A. and
                      Trzciński, A. and Wolke, M. and Wrońska, A. and Wüstner,
                      P. and Yamamoto, A. and Zabierowski, J. and Zieliński, M.
                      J. and Złomańczuk, J. and Żuprański, P. and Żurek, M.},
      title        = {{S}pin {D}ependence of η {M}eson {P}roduction in
                      {P}roton-{P}roton {C}ollisions {C}lose to {T}hreshold},
      journal      = {Physical review letters},
      volume       = {120},
      number       = {2},
      issn         = {1079-7114},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2018-05739},
      pages        = {022002},
      year         = {2018},
      abstract     = {Taking advantage of the high acceptance and axial symmetry
                      of the WASA-at-COSY detector, and the high polarization
                      degree of the proton beam of COSY, the reaction →pp→ppη
                      has been measured close to threshold to explore the
                      analyzing power Ay. The angular distribution of Ay is
                      determined with the precision improved by more than 1 order
                      of magnitude with respect to previous results, allowing a
                      first accurate comparison with theoretical predictions. The
                      determined analyzing power is consistent with zero for an
                      excess energy of Q=15  MeV, signaling s-wave production
                      with no evidence for higher partial waves. At Q=72  MeV
                      the data reveal strong interference of Ps and Pp partial
                      waves and cancellation of (Pp)2 and Ss∗Sd contributions.
                      These results rule out the presently available theoretical
                      predictions for the production mechanism of the η meson.},
      cin          = {IKP-1 / PGI-6 / ZEA-2 / IKP-2 / IKP-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IKP-1-20111104 / I:(DE-Juel1)PGI-6-20110106 /
                      I:(DE-Juel1)ZEA-2-20090406 / I:(DE-Juel1)IKP-2-20111104 /
                      I:(DE-Juel1)IKP-4-20111104},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF3-612)},
      pid          = {G:(DE-HGF)POF3-612},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:29376676},
      UT           = {WOS:000419478800004},
      doi          = {10.1103/PhysRevLett.120.022002},
      url          = {https://juser.fz-juelich.de/record/856093},
}