Singlet polarization functions at
- 2 June 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 58 (1) , 014012
- https://doi.org/10.1103/physrevd.58.014012
Abstract
We consider the three-loop singlet diagrams induced by axial-vector, scalar, and pseudoscalar currents. Expansions for small and large external momentum are presented. They are used in combination with conformal mapping and Padé approximations in order to arrive at results for the polarization functions valid for all Results are presented for the imaginary parts which are directly related to physical quantities such as the production of top quarks or the decay of scalar or pseudoscalar Higgs bosons.
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