/ Experiment-HEP arXiv:1007.1542

Cross section of the $pp\to K^+\Sigma^+n$ reaction close to threshold

Budzanowski, A. (Cracow, INP) ; Chatterjee, A. (Bhabha Atomic Res. Ctr.) ; Clement, H. (Tubingen U.) ; Dorochkevitch, E. (Tubingen U.) ; Hawranek, P. (Jagiellonian U.) ; Hinterberger, F. (Bonn U., HISKP) ; Jahn, R. (Bonn U., HISKP) ; Joosten, R. (Bonn U., HISKP) ; Kilian, K. (JCHP, Julich) ; Kliczewski, S. (Cracow, INP) ; Kirillov, Da. (Essen U.) ; Kirillov, Di. (Dubna, JINR) ; Kolev, D. (Sofiya U.) ; Kravcikova, M. (Kosice Tech. U.) ; Lesiak, M. (JCHP, Julich) ; Machner, H. (Essen U.) ; Magiera, A. (Jagiellonian U.) ; Martinska, G. (Kosice U.) ; Piskunov, N. (Dubna, JINR) ; Protic, D. (JCHP, Julich) ; Ritman, J. (JCHP, Julich) ; von Rossen, P. (JCHP, Julich) ; Roy, B.J. (Bhabha Atomic Res. Ctr.) ; Sibirtsev, A. (Bonn U., HISKP) ; Sitnik, I. (Dubna, JINR) ; Siudak, R. (Bonn U., HISKP) ; Tsenov, R. (Sofiya U.) ; Ulbrich, K. (Bonn U., HISKP) ; Urban, J. (Kosice U.) ; Wagner, G.J. (Tubingen U.)

Published in: Phys.Lett.
Year: 2010
Vol.: B692
Page No: 10-14
Pages: 12

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.

Keyword(s): Meson production ; Hyperon-nucleon interaction

Web-Page: http://durpdg.dur.ac.uk/cgi-hepdata/hepreac/8709904; http://inspirebeta.net/record/861052/files/Daliz_Proj.png; http://inspirebeta.net/record/861052/files/Kaon_spectra.png; http://inspirebeta.net/record/861052/files/exfu_n_Sigma.png; http://inspirebeta.net/record/861052/files/exfu_p_Lambda.png; http://inspirebeta.net/record/861052/files/exfu_p_Sigma1.png; http://inspirebeta.net/record/861052/files/spektrum_higher.png

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