We have constructed an epsilon-finite basis of master integrals for all new types of one-scale tadpoles which appear in the calculation of the four-loop QCD corrections to the electroweak rho-parameter. Using transformation rules from the epsilon-finite basis to the standard minimal-number-of-lines basis, we obtain as a by-product analytical expressions for few leading terms of the epsilon-expansion of all members of the standard basis. The new master integrals have been computed with the help of the Pade method and by use of difference equations independently.
@article{arxiv.hep-ph/0611244,
title = {Standard and epsilon-finite Master Integrals for the rho-Parameter},
author = {M. Faisst and P. Maierhoefer and C. Sturm},
journal= {arXiv preprint arXiv:hep-ph/0611244},
year = {2008}
}