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Vacuum polarization in pQCD: first complete [formula omitted]result

Authors
Journal
Nuclear Physics B - Proceedings Supplements
0920-5632
Publisher
Elsevier
Publication Date
Volume
135
Identifiers
DOI: 10.1016/j.nuclphysbps.2004.09.013

Abstract

We report the results of the first complete QCD five-loop calculation, viz. analytical contribution of order m q 2 α s 4 , to the (absorptive part of) the vacuum polarization function. The contribution directly leads to the knowledge of the the full O ( α s 4 m q 2 / s ) correction to the total cross-section of e + e − annihilation into hadrons. We compare our results with predictions following from various optimization schemes.

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