Author/Authors :
J.J. van der Bij، نويسنده , , K.G. Chetyrkin، نويسنده , , M. Faisst، نويسنده , , G. Jikia، نويسنده , , T. Seidensticker، نويسنده ,
Abstract :
We present analytical results for the leading contributions of the top quark to the electroweak ρ parameter at order GF3Mt6 and GF2Mt4αs. The Higgs boson and the gauge bosons are taken to be massless in this limit. The correction of order GF3Mt6 is found to be sizeable in comparison to the the leading two-loop O(GF2Mt4) correction, however it is much smaller than the subleading O(GF2Mt2MZ2) correction.
