The calculation of the I=2 pion scattering length in quenched lattice QCD is revisited. The calculation is carried out with the Wilson fermion action employing L\"uscher's finite size scaling method at β=5.9, 6.1, and 6.3 corresponding to the range of lattice spacing a≃0.12−0.07 fm. We obtain in the continuum limit a0mπ=−0.0410(69), which is consistent with the prediction of chiral perturbation theory a0mπ=−0.0444(10).
@article{arxiv.hep-lat/0206011,
title = {I=2 Pion Scattering Length with the Wilson Fermion},
author = {JLQCD Collaboration and S. Aoki and M. Fukugita and S. Hashimoto and K-I. Ishikawa and N. Ishizuka and Y. Iwasaki and K. Kanaya and T. Kaneko and Y. Kuramashi and M. Okawa and T. Onogi and S. Tominaga and N. Tsutsui and A. Ukawa and N. Yamada and T. Yoshié},
journal= {arXiv preprint arXiv:hep-lat/0206011},
year = {2016}
}
Comments
LaTeX, 14 pages, 5 eps figures, uses revtex and epsfig