An electroweak library for the calculation of EWRC to e+ e- --> f fbar within the CalcPHEP project

Details An electroweak library for the calculation of EWRC to e+ e- --> f fbar within the CalcPHEP project An electroweak library for the calculation of EWRC to e+ e- --> f fbar within the CalcPHEP project

2000-12-07

arxiv.org/abs/hep-ph/0012080v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revised version, 47 Latex, including 14 figures (2 eps figures), 5 tables

Scientific paper

We present a description of calculations of the electroweak amplitude for e+ e- --> f fbar process. The calculations are done within the OMS (on-mass-shell) renormalization scheme in two gauges: in Rxi, which allows an explicit control of gauge invariance by examining cancellation of gauge parameters and search for gauge-invariant subsets of diagrams, and in the unitary gauge as a cross-check. The formulae we derived are realized in a FORTRAN code eeffLib, which is being created within the framework of the project CalcPHEP. We present a comprehensive comparison between eeffLib results for the light top with corresponding results of the well-known program ZFITTER for the u ubar channel, as well as a preliminary comparison with results existing in the world literature.

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