Zhang Jian-Bo

Low-energy D*+D̄10 scattering and the nature of resonance-like structure Z+ (4430)

Low-energy scattering of D*(+) and (D) over bar (0)(1) meson is studied using quenched lattice QCD with improved lattice actions on anisotropic lattices The threshold scattering parameters, namely the scattering length a(0) and the effective range r(0), for the s-wave scattering in J(P) = 0(-) channel are extracted a(0) = 2 52(47) fm and r(0) = 0 7(1) fm It is argued that, albeit the interaction between the two charmed mesons being attractive, it is unlikely that they can form a shallow bound state in this channel Our calculation provides some useful information on the nature of the newly discovered resonance-like structure Z(+)(4430) by the Belle Collaboration

Quenched Chiral Logarithm Diverge in Very Light Quark Region from the Overlap Lattice Quantum Chromodynamics

With an exact chiral symmetry, overlap fermions allow us to reach very light quark region. In the minimum mps = 179 MeV, the quenched chiral logarithm diverge is examined. The chiral logarithm parameter δ is calculated from both the pseudo-scalar meson mass mps2 diverge channel and the pseudo-scalar decay constant fP channel. In both the cases, we obtain δ = 0.25±0.03. We also observe that the quenched chiral logarithm diverge occurs only in the mps≤400 MeV region.

Phase transition in finite density and temperature lattice QCD

We investigate the behavior of the chiral condensate in lattice QCD at finite temperature and finite chemical potential. The study was done using two flavors of light quarks and with a series of

Low-energy D*{sup +}D{sub 1}{sup 0} scattering and the resonancelike structure Z{sup +}(4430)

\beta

Empirical Baye's Method and Roper Resonance State in Very Light Quark Region

and

Topological susceptibility from overlap fermion

ma

A Cluster Algorithm for the 2-D SU(3) × SU(3) Chiral Model

at the lattice size

A New Cluster Updating for 2-D SU(2) ? SU(2) Chiral Model

24\times12^{2}\times6

On the Order of the Phase Transition in the Three-State Vector Potts Model on a Two-Dimensional Random Lattice

. The calculation was done in the Taylar expansion formalism. We are able to calculate the first and second order derivatives of

Monte carlo study of SU(2) × SU(2) chiral model with mixed action on the 2-dimensional random lattice

\langle\bar{\psi}\psi\rangle