Exotic states in the S=1 N-pi-K system and low-lying 1/2+ S=-1 resonances
Centro de Física Teórica, Departamento de Física, Universidade
de Coimbra, P-3004-516
2 Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, 46100 Burjassot ( Valencia), Spain
a e-mail: email@example.com
In this manuscript we discuss about our study of the and the NπK systems made by solving the Faddeev equations with the two-body t-matrices obtained by solving the Bethe-Salpeter equations with the potentials obtained from chiral dynamics. In the strangeness = -1 case, we found that all the Λ and Σ resonances listed by the particle data group, with spin-parity 1/2+ , in the 1550-1800 MeV region get generated due to the involved three-body dynamics. This motivated us to study the strangeness =1 three-body system, i.e., NπK , where we did not ﬁnd any evidence for the Θ+ (1542) but found a broad bump around 1700 MeV which has a κ(800)N structure.
© Owned by the authors, published by EDP Sciences, 2010