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27 April 2024

» arxiv » 1007.1542

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Cross section of the $pp o K^+Sigma^+n$ reaction close to threshold
A. Budzanowski ; A. Chatterjee ; H. Clement ; E. Dorochkevitch ; P. Hawranek ; F. Hinterberger ; R. Jahn ; R. Joosten ; K. Kilian ; S. Kliczewski ; Da. Kirillov ; Di. Kirillov ; D. Kolev ; M. Kravcikova ; M. Lesiak ; A. Magiera ; G. Martinska ; N. Piskunov ; D. Protic ; J. Ritman ; P. von Rossen ; A. Sibirtsev ; I. Sitnik ; R. Siudak ; R. Tsenov ; K. Ulbrich ; J. Urban ; G.J. Wagner ;
Date:	9 Jul 2010
Abstract:	We have measured inclusive data on $K^+$-meson production in $pp$ collisions at COSY J"ulich close to the hyperon production threshold and determined the hyperon-nucleon invariant mass spectra. The spectra were decomposed into three parts: $Lambda p$, $Sigma^0p$ and $Sigma^+n$. The cross section for the $Sigma^+n$ channel was found to be much smaller than a previous measurement in that excess energy region. The data together with previous results at higher energies are compatible with a phase space dependence.
Source:	arXiv, 1007.1542
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