6 papers
Lattice QCD study of the resonance at the physical point
Qu-Zhi Li, Chuan Liu, Liuming Liu +4
We present a lattice QCD study of the resonance using eight Wilson-Clover ensembles with three lattice spacings and six pion masses ranging from 135 to 320 MeV…
Studies on quark-mass dependence of the pole from PT amplitudes
Xu Wang, Kai-Ge Kang, Qu-Zhi Li +2
The quark-mass dependence of the pole is analyzed using -matrix method, with the scattering amplitude calculated up to order in chiral perturbation theo…
Review on recent progress in the study of the subthreshold singularity and the meson
Qu-Zhi Li, Zhiguang Xiao, Han-Qing Zheng
We summarize recent results on studies of and scatterings. They include the finding of a negative-parity nucleon pole with a mass lower than the nucleon mass, and the pol…
On the pole trajectory of the subthreshold negative parity nucleon with varying pion masses
Qu-Zhi Li, Zhiguang Xiao, Han-Qing Zheng
We study the pole trajectory of the recently established subthreshold negative parity nucleon pole, namely the , with varying pion masses, in the scheme of linear mod…
Roy equation analyses of scatterings at unphysical pion masses
Xiong-Hui Cao, Qu-Zhi Li, Zhi-Hui Guo +1
An extended Roy equation including a bound state pole is used to study scatterings at unphysical large pion masses when becomes a bound state in one situation and stays as…
The study on the singularity structure of scattering amplitudes
Qu-Zhi Li
The method is used to study the channel low energy scattering amplitude. The input of left cuts are obtained from various phenomenological models. With the aid…