CERN Accelerating science

Preprint
Report number	hep-ph/0012080 ; CERN-TH-2001-308 ; JINR-E2-2000-292
Title	An electroweak library for the calculation of EWRC to $e^{+}e^{-} \to f\overline{f}$ within the CalcPHEP project
Author(s)	Bardin, Dimitri Yuri ; Kalinovskaya, L V ; Nanava, G
Affiliation	(JINR) ; (CERN)
Publication	2001
Imprint	Nov 2001
Number of pages	mult.
Subject category	Particle Physics - Phenomenology
Abstract	We present a description of calculations of the electroweak amplitude for e+ e- --> t tbar process. The calculations are done within OMS renormalization scheme in two gauges: Rxi, which allows to explicitly control 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 derived are realized in a FORTRAN code which is being created within the framework of the project topfit --- successor of ZFITTER. We present a comprehensive comparison between topfit results for the light top with corresponding ZFITTER results for u ubar channel, as well as a preliminary comparison with existing in the world literature results.
Other source	Inspire
Submitted by	[email protected]