EPJ

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EPJ A - Hadrons and Nuclei
Hadrons and Nuclei


Eur. Phys. J. A 14, 125-131 (2002)
DOI: 10.1140/epja/iepja1370

$\mth{\Sigma^-}$ atoms and the $\mth{\Sigma N}$ interaction

J. Dabrowski1, J. Rozynek1 and G.S. Anagnostatos2

1  Theoretical Division, Soltan Institute for Nuclear Studies, Hoza 69, Pl-00-681 Warsaw, Poland
2  Institute of Nuclear Physics, National Center for Scientific Research "Democritos", GR-153-10 Aghia Paraskevi. Attiki, Greece

dabrnucl@fuw.edu.pl

(Received: 15 January 2002 / Revised version: 7 March 2002 Communicated by M. Garçon)

Abstract
It is shown that among four models of the Nijmegen baryon-baryon interaction only model F -which leads to a repulsive potential felt by the $\Sigma$ hyperon inside the nucleus- is consistent both with the analysis of $\Sigma^-$ atoms and of the $(K^-,\pi)$ reactions. The Nijmegen models are used to determine the strong complex single-particle (s.p.) potential of $\Sigma^-$, and to calculate the strong-interaction shifts and widths of the lowest observed levels of $\Sigma^-$ atoms. The results obtained with model F are in best agreement with the experimental data.

PACS
13.75.Ev - Hyperon-nucleon interactions.
36.10.Gv - Mesonic atoms and molecules, hyperonic atoms and molecules.

© Società Italiana di Fisica, Springer-Verlag 2002

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