Fermionic and Scalar Corrections for the Abelian Form Factor at Two Loops

Abstract

Two-loop corrections for the form factor in a massive Abelian theory are evaluated, which result from the insertion of massless fermion or scalar loops into the massive gauge boson propagator. The result is valid for arbitrary energies and gauge boson mass. Power-suppressed terms vanish rapidly in the high energy region where the result is well approximated by a polynomial of third order in ln(s/M^2). The relative importance of subleading logarithms is emphasised.

Latex, 10 pages, 5 figures. B. Feucht is B. Jantzen in later publications. (The contents of the paper is unchanged.)

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• Nested Sums, Expansion of Transcendental Functions and Multi-Scale Multi-Loop Integrals
• One-loop leading logarithms in electroweak radiative corrections, I. Results
• Resummation of double logarithms in electroweak high energy processes
• Sudakov Effects in Electroweak Corrections
• Summing up Subleading Sudakov Logarithms
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• Electroweak Sudakov at two loop level
• Two-loop amplitudes with nested sums: Fermionic contributions to e+ e- --> q qbar g
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