Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2001-09-21
Nucl.Phys. B624 (2002) 360-376
Physics
High Energy Physics
High Energy Physics - Lattice
21 pages, 8 figures, latex file typeset with elsart.cls, minor changes
Scientific paper
10.1016/S0550-3213(01)00662-9
In an exploratory study, using the tadpole improved clover Wilson quark action on small, coarse and anisotropic lattices, the $\pi\pi$ scattering length in the I=2 channel is calculated within quenched approximation. A new method is proposed which enables us to make chiral extrapolation of our lattice results without calculating the decay constant on the lattice. Finite volume and finite lattice spacing errors are analyzed and the results are extrapolated towards the infinite volume and continuum limit. Comparisons of our lattice results with the new experiment and the results from Chiral Perturbation Theory are made. Good agreements are found.
Chen Yafeng
Liu Chuan
Ma Jian-Ping
Zhang Junhua
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