Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-01-11
Nucl.Phys.A755:665-668,2005
Physics
Nuclear Physics
Nuclear Theory
Talk given at 10th International Conference on the Structure of Baryons (Baryon 2004) at Palaiseau (France), 25-29 October 200
Scientific paper
10.1016/j.nuclphysa.2005.03.091
Using the lowest order chiral Lagrangian we study s-wave interactions of the baryon decuplet with the octet of pseudoscalar mesons. We find two bound states in the flavour SU(3) limit corresponding to the octet and decuplet representations. These are found to split into eight different trajectories in the complex plane when the SU(3) symmetry is broken gradually. Finally, we are able to provide a reasonable description for a good number of 4-star 3/2- resonances listed by the Particle Data Group. In particular, the Xi(1820), the Lambda(1520) and the Sigma(1670) states are well reproduced. We predict a few other resonances and also evaluate the couplings of the observed resonances to the various channels from the residues at the poles of the scattering matrix from where partial decay widths into different channels can be evaluated.
Oset Eulogio
Sarkar Sourav
Vicente Vacas M. J.
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