CALCULATION OF 2-LOOP TOP-QUARK AND HIGGS-BOSON CORRECTIONS IN THE ELECTROWEAK STANDARD MODEL

Authors
BAUBERGER S WEIGLEIN G
Citation
S. Bauberger et G. Weiglein, CALCULATION OF 2-LOOP TOP-QUARK AND HIGGS-BOSON CORRECTIONS IN THE ELECTROWEAK STANDARD MODEL, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 389(1-2), 1997, pp. 318-322
Citations number
23
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
389
Issue
1-2
Year of publication
1997
Pages
318 - 322
Database
ISI
SICI code
0168-9002(1997)389:1-2<318:CO2TAH>2.0.ZU;2-S
Abstract
A combination of algebraical and numerical techniques for calculating two-loop top-quark and Higgs-boson corrections to electroweak precisio n observables like Delta r or the rho-parameter is presented. The reno rmalization is performed within the on-shell scheme. The results of th e calculations are valid for arbitrary values of m(t), M-H and of the gauge-boson masses. An example is treated where the full result is com pared to the result obtained via an expansion up to next-to-leading or der in m(t). As an application, results for the Higgs-mass dependent t op-contributions to Delta r are given.