Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9855040 | Nuclear Physics B | 2005 | 58 Pages |
Abstract
We consider the ZâQQ¯ vertex to order αS2 in the QCD coupling for an on-shell massive quark-antiquark pair and for arbitrary momentum transfer of the Z boson. We present closed analytic expressions for the two parity-violating form factors of that vertex at the two-loop level in QCD, excluding the contributions from triangle diagrams. These form factors are expressed in terms of 1-dimensional harmonic polylogarithms of maximum weight 4.
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Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
W. Bernreuther, R. Bonciani, T. Gehrmann, R. Heinesch, T. Leineweber, P. Mastrolia, E. Remiddi,