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preprints:2002:ttp02-44 [2016/03/15 20:39] (current)
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 +====== TTP02-44 Five-loop vacuum polarization in pQCD: O(alpha_s^4 n_f^2) results ====== 
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 +<hidden TTP02-44 ​ Five-loop vacuum polarization in pQCD: O(alpha_s^4 n_f^2) results > We give a short presentation of the first genuine QCD five-loop 
 + ​calculations,​ viz. analytical contributions of order \alpha_s^4 n_f^2 and 
 + m_q^2 \alpha_s^4 n_f^2 to the vacuum polarization function of 
 + ​vector ​ currents. These corrections form an important gauge-invariant 
 + ​subset of the full  O(\alpha_s^4) correction to the total cross-section  
 + of e^+ e^- annihilation ​ into hadrons. 
 + </​hidden>​ 
 +|**P.A. Baikov, K.G. Chetyrkin and J.H. K\"​uhn** ​ |  
 +|**       ​Nucl.Phys.B(Proc.Suppl.) ​  ​116 ​ (2003  Proceedings of RADCOR 2002 8-13 September 2002, Kloster Banz, Germany. ) 78-82 **  | 
 +| {{preprints:​2002:​ttp02-44.pdf|PDF}} {{preprints:​2002:​ttp02-44.ps|PostScript}} ​  | 
 +| |