Speaker
Dr
Zhi-Hui Guo
(Hebei Normal University)
Description
I discuss the meson-baryon scattering processes with strangeness -1 within the unitarized chiral perturbation theory. Ten coupled channels are included in the discussion. By performing several sophisticated fits to a large amount of data, it enables us to give a strong constraint on the free parameters and the meson-baryon scattering amplitudes. We then study the uncertainty that is caused by using different strategies in the fits. We find that large error bars in the sub-threshold region of the K- p amplitude show up by either employing one weak pseudo-Goldstone decay constant or distinguishing between the decay constants of pi, K and eta. Finally, we study the poles from the S-wave amplitudes and pay special attention to the Lambda(1405) resonance.
Primary author
Dr
Zhi-Hui Guo
(Hebei Normal University)
Co-author
Dr
Jose Antonio Oller
(Universidad de Murcia)
