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Three-Loop Leading Top Mass Contributions to the rho Parameter

J. J. van der Bij·K. G. Chetyrkin·M. Faisst·G. Jikia·T. Seidensticker
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Abstract

We present analytical results for the leading contributions of the top quark to the electroweak rho parameter at order GF^3 Mt^6 and GF^2 Mt^4 alpha_s. The Higgs boson and the gauge bosons are taken to be massless in this limit. The correction of order GF^3 Mt^6 is found to be sizeable in comparison to the the leading two-loop GF^2 Mt^4 correction, however it is much smaller than the subleading GF^2 Mt^2 MZ^2 correction.

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J. J. van der Bij, K. G. Chetyrkin, M. Faisst, G. Jikia, T. Seidensticker. 2000-12-19. Three-Loop Leading Top Mass Contributions to the rho Parameter. https://doi.org/10.1016/s0370-2693(01)00002-8

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