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preprints:2006:ttp06-17 [2016/03/17 11:03] (current)
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 +====== TTP06-17 Four-Loop QCD Corrections to the Rho Parameter ====== 
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 +   <​hidden TTP06-17 ​ Four-Loop QCD Corrections to the Rho Parameter > The four-loop QCD corrections to the electroweak $\rho$-parameter 
 + ​arising from top and bottom quark loops are computed. Specifically we 
 + ​evaluate the missing ``non-singlet''​ piece. Using algebraic methods 
 + the amplitude is reduced to a set of around 50 new master integrals 
 + which are calculated with various analytical and numerical 
 + ​methods. Inclusion of the newly completed term halves the final value 
 + of the four-loop correction for the minimally renormalized top-quark 
 + mass. The predictions for the shift of the weak mixing angle and the 
 + ​W-boson mass is thus stabilized. 
 + </​hidden>​ 
 +|**K.G.~Chetyrkin,​ M.~Faisst, J.H.~Kuehn, P. Maierhoefer,​ C. Sturm** ​ |  
 +|**  Phys. Rev. Lett.  97 102003 2006  **  | 
 +| {{preprints:​2006:​ttp06-17.pdf|PDF}} {{preprints:​2006:​ttp06-17.ps|PostScript}} [[http://​arxiv.org/​abs/​hep-ph/​0605201|arXiv]] ​  | 
 +| |