Eur. Phys. J. A 11, 105-111 (2001)
The role of hyperon resonances in
processes
S. Janssen, J. Ryckebusch, W. Van Nespen, D. Debruyne and T. Van Cauteren Department of Subatomic and Radiation Physics, Ghent University, Proeftuinstraat 86, B-9000 Gent, Belgium stijn.janssen@rug.ac.be
jan.ryckebusch@rug.ac.be
(Received: 8 February 2001 / Revised version: 19 April 2001 Communicated by Th. Walcher)
Abstract
We discuss the role of hyperon resonances in the u-channel
when modeling
processes in an
effective Lagrangian approach. Without the introduction of hyperon
resonances, one is forced to use soft hadronic form
factors with a cutoff mass which is at best two times the kaon mass.
After inclusion of the hyperon resonances in the u-channel, we obtain
a fair description of the data with a cutoff mass of the order of 1.8
GeV.
13.60.Le - Meson production.
14.20.Jn - Hyperons.
14.20.Gk - Baryon resonances with S=0 .
© Società Italiana di Fisica, Springer-Verlag 2001
