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28 March 2024
 
  » arxiv » nucl-ex/9810009

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Observation of strong final-state effects in pi+ production in pp collisions at 400 MeV
A. Betsch ; R. Bilger ; W. Brodowski ; H. Calen ; H. Clement ; J. Dyring ; C. Ekstrom ; K. Fransson ; L. Gustafsson ; S. Haggstrom ; B. Hoistad ; J. Johanson ; A. Johansson ; T. Johansson ; K. Kilian ; S. Kullander ; A. Kupsc ; G. Kurz ; P. Marciniewski ; B. Morosov ; A. Mortsell ; W. Oelert ; R.J.M.Y. Ruber ; M.G. Schepkin ; J. Stepaniak ; A. Sukhanov ; A. Turowiecki ; G.J. Wagner ; Z. Wilhelmi ; J. Zabierowski ; A. Zernov ; J. Zlomanczuk ;
Date 13 Oct 1998
Journal Phys.Lett. B446 (1999) 179-184
Subject nucl-ex
AbstractDifferential cross sections of the reactions $pp o dpi^+$ and $pp o pnpi^+$ have been measured at $T_p = 400$ MeV by detecting the charged ejectiles in the angular range $4^0 leq Theta_{Lab} leq 21^circ$. The deduced total cross sections agree well with those published previously for neighbouring energies. The invariant mass spectra are observed to be strongly affected by $Delta$ production and $NN$ final-state interaction. The data are well described by Monte Carlo simulations including both these effects. The ratio of $pp o pnpi^+$ and $pp o dpi^+$ cross sections also compares favourably to a recent theoretical prediction which suggests a dominance of $np$-production in the relative $^3S_1$-state.
Source arXiv, nucl-ex/9810009
Other source [GID 816376] nucl-ex/9810009
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