190 citations · 774 across the 18 of their papers we have counts for
11 papers · 1 filter
Analyses of pion-nucleon elastic scattering amplitudes up to in extended-on-mass-shell subtraction scheme
Yun-Hua Chen, De-Liang Yao, H. Q. Zheng
We extend the analysis of elastic pion-nucleon scattering up to level using extended-on-mass-shell subtraction scheme within the framework of covariant baryon chiral pertu…
A Dispersive Analysis on the and Resonances in Processes
Yu Mao, Xuan-Gong Wang, Ou Zhang +2
We estimate the di-photon coupling of , and resonances in a coupled channel dispersive approach. The di-photon coupling is also reinvest…
Ambiversion of X(3872)
Ou Zhang, C. Meng, H. Q. Zheng
An analysis including most recent Belle data on X(3872) is performed, using coupled channel Flatté formula. A third sheet pole close to but \textit{below} threshold is…
Dynamical Properties of the Meson
H. Q. Zheng
Studies on the dynamical properties of the meson are reviewed and discussed. The important role of fundamental principles such as analyticity, unitarity and crossing symmetry p…
On the scalar nonet in the extended Nambu Jona-Lasinio model
Ming-Xian Su, L. Y. Xiao, H. Q. Zheng
We discuss the lightest scalar resonances, , , and in the extended Nambu Jona-Lasinio model. We find that the model parameters can be tuned,…
Is the meson dynamically generated?
Zhi-hui Guo, L. Y. Xiao, H. Q. Zheng
We study the problem whether the meson is generated `dynamically'. A pedagogical analysis on the toy O(N) linear sigma model is performed and we find that the large limit…
Lightest scalars as chiral partners of the Nambu--Goldstone bosons
L. Y. Xiao, H. Q. Zheng, Z. Y. Zhou
We review the spectrum of lightest scalar resonances recently determined using dispersion techniques. The conceptual difference between the pole mass and the bare mass (or the line…
An improved study of the kappa resonance and the non-exotic wave scatterings up to GeV of LASS data
Z. Y. Zhou, H. Q. Zheng
We point out that the dispersion relation for the left hand cut integral presented in one of our previous paper (Nucl. Phys. {\bf A}733(2004)235) is actually free of subtraction co…
On the nature of the lightest scalar resonances
Z. X. Sun, L. Y. Xiao, Z. G. Xiao +2
We briefly review the recent progresses in the new unitarization approach being developed by us. Especially we discuss the large scatterings by making use of the partial…
The properties of the and resonances in a new unitarization approach
H. Q. Zheng, Z. Y. Zhou, G. Y. Qin +1
A new unitarization approach is discussed and applied to study the elastic scattering process. The existence of the light resonance is firmly established if the scattering…
A Critical Examination to the Unitarized Scattering Chiral Amplitudes
Qin Ang, Zhiguang Xiao, H. Zheng +1
We discuss the Padé approximation to the scattering amplitudes in 1--loop chiral perturbation theory. The approximation restores unitarity and can reproduce the correct resona…