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24 April 2024

» arxiv » nucl-ex/0206020

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Search for Narrow NNpi Resonances in Exclusive p p -> p p pi+ pi- Measurements
W. Brodowski ; J. Paetzold ; R. Bilger ; H. Calen ; H. Clement ; C. Ektrom ; K. Fransson ; J. Greiff ; S. Haggstrom ; B. Hoistad ; J. Johanson ; A. Johansson ; T. Johannsson ; K. Kilian ; S. Kullander ; A. Kupsc ; P. Marciniewski ; B. Morosov ; W. Oelert ; R.J.M.Y. Ruber ; M. Schepkin ; W. Scobel ; J. Stepaniak ; A. Sukhanov ; A. Turowiecki ; G. J. Wagner ; Z. Wilhelmi ; J. Zabierowski ; J. Zlomanczuk ;
Date:	28 Jun 2002
Journal:	Phys.Lett. B550 (2002) 147-153
Subject:	nucl-ex
Abstract:	Narrow structures in the range of a few MeV have been searched for in p p pi+ and p p pi- invariant mass spectra obtained from exclusive measurements of the p p -> p p pi+ pi- reaction at Tp = 725, 750 and 775 MeV using the PROMICE/WASA detector at CELSIUS. The selected reaction is particularily well suited for the search for NN and / or N Delta decoupled dibaryon resonances. Except for a possible fluctuation at 2087 MeV/c^2 in Mpppi- no narrow structures could be identified neither in Mpppi+ nor in Mpppi- on the 3 sigma level of statistical significance, giving an upper limit (95% C.L.) for dibaryon production in this reaction of sigma < 20 nb for 2020 MeV/c^2 < m(dibaryon) < 2085 MeV/c^2
Source:	arXiv, nucl-ex/0206020
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