1206.0176 (D. Bettinelli et al.)

Heavy top renormalon contribution to fermion propagators    [PDF]

D. Bettinelli, J. J. van der Bij

We study resummed perturbative contributions due to a heavy top-quark. These renormalon contributions are evaluated for fermion propagators. Results for the top-quark width are given. Estimates of non-perturbative uncertainties are made on the \rho-parameter using different schemes of dealing with the Landau-pole. For the physical top-quark mass the effects are negligible.

View original: http://arxiv.org/abs/1206.0176