We report preliminary results for the I=2 pion scattering length a_0, calculated with chirally improved fermions. After chiral extrapolation our results are in good agreement with both, experimental and theoretical predictions.
@article{arxiv.hep-lat/0409064,
title = {Pion scattering on the lattice with chirally improved fermions},
author = {Christof Gattringer and Dieter Hierl and Rainer Pullirsch},
journal= {arXiv preprint arXiv:hep-lat/0409064},
year = {2007}
}