Institute for Theoretical Particle Physics (TTP)

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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}}   | 
 +| |