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+ | ====== TTP10-05 Adler Function, Bjorken Sum Rule, and the Crewther Relation to Order alpha_s^$ in a General Gauge Theory ====== | ||
+ | |||
+ | |||
+ | < | ||
+ | | ||
+ | and to the (non-singlet) Adler function for the case of a generic colour gauge group. | ||
+ | We confirm at the same order a (generalized) | ||
+ | | ||
+ | of the correctness of our previously obtained | ||
+ | and the five-loop \beta-function in quenched QED. | ||
+ | In particular, the appearance of an irrational contribution proportional | ||
+ | to zeta_3 in the latter | ||
+ | We obtain | ||
+ | | ||
+ | the Adler function at order alpha_s^4. | ||
+ | </ | ||
+ | |**P.A. Baikov, K.G. Chetyrkin and J.H. K\" | ||
+ | |** Phys.Rev.Lett. 104 132004 2010 ** | | ||
+ | | {{preprints: | ||
+ | | | |