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19 March 2024
 
  » arxiv » 1301.0843

 Article overview


Search for the eta-mesic 4He with WASA-at-COSY detector
P.Adlarson ; W.Augustyniak ; W.Bardan ; M.Bashkanov ; T.Bednarski ; F.S.Bergmann ; M.Berlowski ; H.Bhatt ; M.Buescher ; H.Calen ; H.Clement ; D.Coderre ; E.Czerwinsk ; K.Demmich ; E.Doroshkevich ; R.Engels ; W.Erven ; W.Eyrich ; P.Fedorets ; K.Foehl ; K.Fransson ; F.Goldenbaum ; P.Goslawski ; A.Goswami ; K.Grigoryev ; C.-O.Gullstroem ; F.Hauenstein ; L.Heijkenskjoeld ; V.Hejny ; F.Hinterberger ; M.Hodana ; B.Hoeistad ; A.Jany ; B.R.Jany ; L.Jarczyk ; T.Johansson ; B.Kamys ; G.Kemmerling ; F.A.Khan ; A.Khoukaz ; S.Kistryn ; J.Klaja ; H.Kleines ; B.Klos ; M.Krapp ; W.Krzemien ; P.Kulessa ; A.Kupsc ; K.Lalwani ; D.Lersch ; L.Li ; B.Lorentz ; A.Magiera ; R.Maier ; P.Marciniewski ; B.Marianski ; M.Mikirtychiants ; H.-P.Morsch ; P.Moskal ; B.K.Nandi ; S.Niedzwiecki ; H.Ohm ; I.Ozerianska ; E.Perez del Rio ; P.Plucinski ; P.Podkopal ; D.Prasuhn ; A.Pricking ; D.Pszczel ; K.Pysz ; A.Pyszniak ; C.F.Redmer ; J.Ritman ; A.Roy ; Z.Rudy ; S.Sawant ; S.Schadmand ; A.Schmidt ; T.Sefzick ; V.Serdyuk ; N.Shah ; M.Siemaszko ; R.Siudak ; T.Skorodko ; M.Skurzok ; J.Smyrski ; V.Sopov ; R.Stassen ; J.Stepaniak ; E.Stephan ; G.Sterzenbach ; H.Stockhorst ; H.Stroeher ; A.Szczurek ; T.Tolba ; A.Trzcinski ; R.Varma ; P.Vlasov ; G.J.Wagner ; W.Weglorz ; M.Wolke ; A.Wronska ; P.Wuestner ; P.Wurm ; A.Yamamoto ; X.Yuan ; L.Yurev ; J.Zabierowski ; C.Zheng ; M.J.Zielinski ; W.Zipper ; J.Zlomanczuk ; P.Zupranski ; M.Zurek ;
Date 4 Jan 2013
AbstractAn exclusive measurement of the excitation function for the dd->3Heppi- reaction was performed at the Cooler Synchrotron COSY-Juelich with the WASA-at-COSY detection system. The data were taken during a slow acceleration of the beam from 2.185 GeV/c to 2.400 GeV/c crossing the kinematic threshold for the eta meson production in the dd->4He-eta reaction at 2.336 GeV/c. The corresponding excess energy with respect to the 4He-eta system varied from -51.4MeV to 22MeV. The integrated luminosity in the experiment was determined using the dd->3Hen reaction. The shape of the excitation function for the dd->3Heppi- was examined. No signal of the 4He-eta bound state was observed. An upper limit for the cross-section for the bound state formation and decay in the process dd->(4He-eta)bound->3Heppi- was determined on the 90% confidence level and it varies from 20nb to 27nb for the bound state width ranging from 5MeV to 35MeV, respectively.
Source arXiv, 1301.0843
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