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19 March 2024
 
  » arxiv » 1104.0123

 Article overview


ABC Effect in Basic Double-Pionic Fusion --- Observation of a new resonance?
P. Adlarson ; C. Adolph ; W. Augustyniak ; V. Baru ; M. Bashkanov ; F.S. Bergmann ; M. Berlowski ; H. Bhatt ; K.-T. Brinkmann ; M. Buescher ; H. Calen ; H. Clement ; D. Coderre ; E. Czerwinski ; E. Doroshkevich ; C. Ekstrom ; R. Engels ; W. Erven ; W. Eyrich ; P. Fedorets ; K. Foehl ; K. Fransson ; F. Goldenbaum ; P. Goslawski ; K. Grigoryev ; V. Grishina ; C.-O. Gullstrom ; J. Hampe ; C. Hanhart ; L. Heijkenskj ; V. Hejny ; F. Hinterberger ; M. Hodana ; B. Hoistad ; M. Jacewicz ; M. Janusz ; A. Jany ; B.R. Jany ; L. Jarczyk ; J. Jaus ; T. Johansson ; B. Kamys ; G. Kemmerling ; O. Khakimova ; A. Khoukaz ; S. Kistryn ; J. Klaja ; H. Kleines ; B. Klos ; F. Kren ; W. Krzemien ; P. Kulessa ; S. Kullander ; A. Kupsc ; K. Lalwani ; B. Lorentz ; A. Magiera ; R. Maier ; P. Marciniewski ; B. Marianski ; M. Mikirtychiants ; P. Moskal ; H.-P. Morsch ; B.K. Nandi ; H. Ohm ; A. Passfeld ; C. Pauly ; E. Perez del Rio ; Y. Petukhov ; N. Piskunov ; P. Plucinski ; P. Podkopal ; A. Povtoreyko ; D. Prasuhn ; A. Pricking ; K. Pysz ; T. Rausmann ; C.F. Redmer ; J. Ritman ; A. Roy ; R.J.M.Y. Ruber ; Z. Rudy ; S. Schadmand ; A. Schmidt ; W. Schroeder ; T. Sefzick ; V. Serdyuk ; N. Shah ; M. Siemaszko ; R. Siudak ; T. Skorodko ; M. Skurzok ; J. Smyrski ; V. Sopov ; R. Stassen ; J. Stepaniak ; G. Sterzenbach ; H. Stockhorst ; H. Stroeher ; A. Szczurek ; A. Taeschner ; T. Tolba ; A. Trzcinski ; R. Varma ; P. Vlasov ; G.J. Wagner ; W. Weglorz ; A. Winnemoeller ; A. Wirzba ; M. Wolke ; A. Wronska ; P. Wuestner ; P. Wurm ; L. Yurev ; J. Zabierowski ; M.J. Zielinski ; W. Zipper ; J. Zlomanczuk ; P. Zupranski ;
Date 1 Apr 2011
AbstractWe report on a high-statistics measurement of the basic double pionic fusion reaction $pn o dpi^0pi^0$ over the energy region of the so-called ABC effect, a pronounced low-mass enhancement in the $pipi$-invariant mass spectrum. The measurements were performed with the WASA detector setup at COSY. The data reveal the ABC effect to be associated with a Lorentzian shaped energy dependence in the integral cross section. The observables are consistent with a resonance with $I(J^P) =0(3^+)$ in both $pn$ and $DeltaDelta$ systems. Necessary further tests of the resonance interpretation are discussed.
Source arXiv, 1104.0123
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