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High Energy Physics - Experiment

arXiv:1007.1542 (hep-ex)
[Submitted on 9 Jul 2010 (v1), last revised 15 Jul 2010 (this version, v2)]

Title:Cross section of the $pp\to K^+Σ^+n$ reaction close to threshold

Authors: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, H. Machner, 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
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Abstract:We have measured inclusive data on $K^+$-meson production in $pp$ collisions at COSY Jülich 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.
Comments: accepted by Phys. lett. B some typos corrected
Subjects: High Energy Physics - Experiment (hep-ex); High Energy Physics - Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
Cite as: arXiv:1007.1542 [hep-ex]
  (or arXiv:1007.1542v2 [hep-ex] for this version)
  https://doi.org/10.48550/arXiv.1007.1542
Journal reference: Phys.Lett.B692:10-14,2010
Related DOI: https://doi.org/10.1016/j.physletb.2010.07.015

Submission history

From: Hartmut Machner [view email]
[v1] Fri, 9 Jul 2010 09:34:50 UTC (141 KB)
[v2] Thu, 15 Jul 2010 08:43:53 UTC (141 KB)
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