====== TTP10-14 R(s), Bjorken sum rule and the Crewther Relation in order alpha_s^4 ======
 
 
<hidden TTP10-14  R(s), Bjorken sum rule and the Crewther Relation in order alpha_s^4 > We report on our calculation of  the order alpha_s^4
 contributions to the Bjorken sum rule for  polarized electron-nucleon  scattering
 and to the (non-singlet) part of the cross section for electron-positron
 annihilation into hadrons for the  case of a  generic colour gauge group.
 We confirm at the same order a (generalized)
 Crewther relation between the Bjorken sum rule and the corresponding Adler function  which provides a strong test
 of the correctness of our previously obtained  results:  the ratio R(s) in QCD
 and the five-loop beta-function in  quenched QED.
 </hidden>
|**K.G. Chetyrkin**  | 
| {{preprints:2010:ttp10-14.pdf|PDF}} {{preprints:2010:ttp10-14.ps|PostScript}}   |
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