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Paper detail

Two-Loop QCD Corrections to the Heavy Quark Form Factors: Axial Vector Contributions

We consider the Z Q Qbar vertex to second order 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.

preprint2004arXivOpen access
W. BernreutherR. BoncianiT. GehrmannR. HeineschT. LeineweberP. MastroliaE. Remiddi
hep-ph
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W. BernreutherR. BoncianiT. GehrmannR. HeineschT. LeineweberP. MastroliaE. Remiddi

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