Speaker
Dr
Zhihui Guo
(Hebei Normal University)
Description
In this talk, we will introduce the finite-volume effects in the chiral effective field theory and analyse the lattice finite-volume energy levels to extract the resonance properties with the unphysical and physical pion masses. Special attention will be paid to the a0(980) from the coupled-channel scattering of pi-eta, K-Kbar and pi-eta'. Preliminary results on the D-pi, Ds-Kbar and D-eta scattering will be also presented.
A global fit to recent lattice finite-volume energy levels from pi-eta scattering and relevant experimental data on a pi-eta event distribution and the gamma-gamma -> pi-eta cross section is performed. Both the leading and next-to-leading-order analyses lead to similar and successful descriptions of the finite-volume energy levels and the experimental data. However, these two different analyses yield different pi-eta scattering phase shifts for the physical masses for the pi, K, eta and eta' mesons. The inelasticities, the pole positions in the complex energy plane and their residues are calculated both for unphysical and physical meson masses.
Primary author
Dr
Zhihui Guo
(Hebei Normal University)