Speaker
Ms
Xiao Li-Ye
(Hunan Normal University)
Description
The reaction K−p → η at low energies is studied with a chiral quark model approach. Good descriptions of
the existing experimental data are obtained. It is found that (1670) dominates the reaction around threshold.
Furthermore, u- and t-channel backgrounds play crucial roles in this reaction as well. The contributions from
the D-wave state (1690) are negligibly small for its tiny coupling to η. To understand the strong coupling
properties of the low-lying negative parity resonances extracted from the ¯KN scattering, we further study their
strong decays. It is found that these resonances are most likely mixed states between different configurations.
Considering these low-lying negative parity resonances as mixed three-quark states, we can reasonably understand
both their strong decay properties from Particle Data Group and their strong coupling properties extracted
from the ¯K N scattering. As a byproduct, we also predict the strong decay properties of the missing D-wave
state |3
2
−i3 with a mass of ∼ 1.8 GeV. We suggest our experimental colleagues search it in the (1385)π and
π channels.
Primary author
Ms
Xiao Li-Ye
(Hunan Normal University)
Co-author
Prof.
Zhong Xian-Hui
(Hunan Normal University)
