arXiv subjects

Xi-Yan Fang

Publications and source records attributed to Xi-Yan Fang.

2 recordsLinked to original sources

arXiv2004

Approximated seventh order calculation of vacuum wave function of 2+1 dimensional SU(2) lattice gauge theory

Using the coupled cluster expansion with the random phase approximation, we calculate the long wavelength vacuum wave function and the vacuum energy of 2+1 dimensional Hamiltonian SU(2) lattice gauge theory (LGT) up to the seventh order. The coefficients $μ_0$, $μ_2$ of the vacuum wave function show good scaling behavior and convergence in high order calculations.

hep-lat↗

arXiv1996

Glueball Masses from Hamiltonian Lattice QCD

We calculate the masses of the $0^{++}$, $0^{--}$ and $1^{+-}$ glueballs from QCD in 3+1 dimensions using an eigenvalue equation method for Hamiltonian lattice QCD developed and described elsewhere by the authors. The mass ratios become approximately constants in the coupling region $6/g^2 \in [6.0,6.4]$, from which we estimate $M(0^{--})/M(0^{++})=2.44 \pm 0.05 \pm 0.20$ and $M(1^{+-})/M(0^{++})=1.91 \pm 0.05 \pm 0.12$.

hep-ph↗