1202.0232 (G. Agakishiev et al.)

Determination of the $\mathbf{Σ(1385)^{0}/Λ(1405)}$ ratio in
p+p collisions at 3.5 GeV    [PDF]

G. Agakishiev, A. Balanda, D. Belver, A. V. Belyaev, A. Blanco, M. Böhmer, J. L. Boyard, P. Cabanelas, E. Castro, J. C. Chen, S. Chernenko, T. Christ, M. Destefanis, F. Dohrmann, A. Dybczak, E. Epple, L. Fabbietti, O. V. Fateev, P. Finocchiaro, P. Fonte, J. Friese, I. Fröhlich, T. Galatyuk, J. A. Garzón, R. Gernhäuser, C. Gilardi, M. Golubeva, D. González-Díaz, F. Guber, M. Gumberidze, T. Heinz, T. Hennino, R. Holzmann, I. Iori, A. Ivashkin, M. Jurkovic, B. Kämpfer, K. Kanaki, T. Karavicheva, I. Koenig, W. Koenig, B. W. Kolb, R. Kotte, A. Krása, F. Krizek, R. Krücken, H. Kuc, W. Kühn, A. Kugler, A. Kurepin, R. Lalik, S. Lang, J. S. Lange, K. Lapidus, T. Liu, L. Lopes, M. Lorenz, L. Maier, A. Mangiarotti, J. Markert, V. Metag, B. Michalska, J. Michel, E. Morinière, J. Mousa, C. Müntz, L. Naumann, J. Otwinowski, Y. C. Pachmayer, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, J. Pietraszko, W. Przygoda, B. Ramstein, A. Reshetin, A. Rustamov, A. Sadovsky, P. Salabura, A. Schmah, E. Schwab, J. Siebenson, Yu. G. Sobolev, S. Spataro, B. Spruck, H. Ströbele, J. Stroth, C. Sturm, A. Tarantola, K. Teilab, P. Tlusty, M. Traxler, R. Trebacz, H. Tsertos, V. Wagner, M. Weber, C. Wendisch, J. Wüstenfeld, S. Yurevich, Y. V. Zanevsky

The aim of the present analysis is to determine the relative production cross
sections of the $\Lambda$(1405) and $\Sigma(1385)^{0}$ resonances in p+p
collisions at E$_{kin}$=3.5 GeV measured with HADES. Upper and lower limits
have been determined for the ratio
$\sigma_{(\Sigma(1385)^{0}+p+K^{+})}/\sigma_{(\Lambda(1405)+p+K^{+})}=0.76_{-0.26}^{+0.54}$.
The knowledge of this ratio is an essential input for the analysis of the decay
$\Lambda(1405)\rightarrow\Sigma^{\pm}\pi^{\mp}$, where an unambiguous
separation of the $\Lambda$(1405) and $\Sigma(1385)^{0}$ signals is not
possible.

View original: http://arxiv.org/abs/1202.0232