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@ARTICLE{Adlarson:873388,
      author       = {Adlarson, P. and Augustyniak, W. and Bardan, W. and
                      Bashkanov, M. and Bass, S. D. and Berłowski, M. and Bondar,
                      A. and Büscher, M. and Calén, H. and Ciepał, I. and
                      Clement, H. and Czerwiński, E. and Engels, Ralf W. 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 Heijkenskjöld, L. and Hejny, V.
                      and Hirenzaki, S. and Jarczyk, L. and Johansson, T. and
                      Kamys, B. and Kelkar, N. G. and Kemmerling, G. and Khreptak,
                      A. and Kirillov, D. A. and Kistryn, S. and Kleines, H. and
                      Kłos, B. and Krzemień, W. and Kulessa, P. and Kupść, 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 Ritman, J. and Roy, A. and
                      Rundel, O. and Sawant, S. and Schadmand, S. and
                      Schätti–Ozerianska, I. and Sefzick, T. and Serdyuk, V.
                      and Shwartz, B. 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
                      Stroeher, Hans 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}earch for η mesic $^3${H}e with the {WASA}-at-{COSY}
                      facility in the p d → $^3${H}e 2γ and p d → $^3${H}e
                      6γ reactions},
      journal      = {Physics letters / B},
      volume       = {802},
      issn         = {0370-2693},
      address      = {Amsterdam},
      publisher    = {North-Holland Publ.},
      reportid     = {FZJ-2020-00699},
      pages        = {135205 -},
      year         = {2020},
      abstract     = {We report on the experimental search for the bound state of
                      an η meson and 3He nucleus performed using the WASA-at-COSY
                      detector setup. In order to search for the η-mesic nucleus
                      decay, the pd→ 3He2γ and pd→ 3He6γ channels have been
                      analysed. These reactions manifest the direct decay of η
                      meson bound in 3He nucleus. This non-mesonic decay channel
                      has been considered for the first time. When taking into
                      account only statistical errors, the obtained excitation
                      functions reveal a slight indication for a possible bound
                      state signal corresponding to an 3He-η nucleus width Γ
                      above 20 MeV and binding energy Bs between 0 and 15 MeV.
                      However, the determined cross sections are consistent with
                      zero in the range of the systematic uncertainty. Therefore,
                      as final result we estimate only the upper limit for the
                      cross section of the η-mesic 3He nucleus formation followed
                      by the η meson decay which varies between 2 nb and 15 nb
                      depending on possible bound state parameters.},
      cin          = {IKP-1 / IKP-2 / ZEA-2 / IKP-4 / IKP-TA},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IKP-1-20111104 / I:(DE-Juel1)IKP-2-20111104 /
                      I:(DE-Juel1)ZEA-2-20090406 / I:(DE-Juel1)IKP-4-20111104 /
                      I:(DE-Juel1)IKP-TA-20111104},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF3-612)},
      pid          = {G:(DE-HGF)POF3-612},
      experiment   = {EXP:(DE-Juel1)WASA-at-COSY-20170712},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000515091400060},
      doi          = {10.1016/j.physletb.2020.135205},
      url          = {https://juser.fz-juelich.de/record/873388},
}