Two-loop contributions to electroweak precision observables in the MSSM

The evaluation of the two-loop MSSM-contributions to the electroweak precision observables M_W and s_w^eff at order(alpha_t^2), order(alpha_t alpha_b), order(alpha_b^2) is presented. These contributions enter via Delta(rho), and it is explained in detail how one can retain the true, non-vanishing va...

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Detalles Bibliográficos
Autores principales: Haestier, J, Stöckinger, D, Weiglein, Georg, Heinemeyer, S
Lenguaje:eng
Publicado: 2005
Materias:
Particle Physics - Phenomenology
Acceso en línea:http://cds.cern.ch/record/846513
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author Haestier, J
Stöckinger, D
Weiglein, Georg
Heinemeyer, S
author_facet Haestier, J
Stöckinger, D
Weiglein, Georg
Heinemeyer, S
author_sort Haestier, J
collection CERN
description The evaluation of the two-loop MSSM-contributions to the electroweak precision observables M_W and s_w^eff at order(alpha_t^2), order(alpha_t alpha_b), order(alpha_b^2) is presented. These contributions enter via Delta(rho), and it is explained in detail how one can retain the true, non-vanishing value of the MSSM Higgs boson mass M_h in spite of using the gauge-less limit in the calculation. The numerical results can be sizeable, in particular for strong squark mixing. By comparing the results in the on-shell and DR-bar renormalization schemes, the remaining theoretical uncertainty is found to be small.
id cern-846513
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
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spelling cern-8465132019-09-30T06:29:59Zhttp://cds.cern.ch/record/846513engHaestier, JStöckinger, DWeiglein, GeorgHeinemeyer, STwo-loop contributions to electroweak precision observables in the MSSMParticle Physics - PhenomenologyThe evaluation of the two-loop MSSM-contributions to the electroweak precision observables M_W and s_w^eff at order(alpha_t^2), order(alpha_t alpha_b), order(alpha_b^2) is presented. These contributions enter via Delta(rho), and it is explained in detail how one can retain the true, non-vanishing value of the MSSM Higgs boson mass M_h in spite of using the gauge-less limit in the calculation. The numerical results can be sizeable, in particular for strong squark mixing. By comparing the results in the on-shell and DR-bar renormalization schemes, the remaining theoretical uncertainty is found to be small.hep-ph/0506259CERN-PH-TH-2005-116DCPT-2005-68IPPP-2005-34oai:cds.cern.ch:8465132005-06-24
spellingShingle Particle Physics - Phenomenology
Haestier, J
Stöckinger, D
Weiglein, Georg
Heinemeyer, S
Two-loop contributions to electroweak precision observables in the MSSM
title Two-loop contributions to electroweak precision observables in the MSSM
title_full Two-loop contributions to electroweak precision observables in the MSSM
title_fullStr Two-loop contributions to electroweak precision observables in the MSSM
title_full_unstemmed Two-loop contributions to electroweak precision observables in the MSSM
title_short Two-loop contributions to electroweak precision observables in the MSSM
title_sort two-loop contributions to electroweak precision observables in the mssm
topic Particle Physics - Phenomenology
url http://cds.cern.ch/record/846513
work_keys_str_mv AT haestierj twoloopcontributionstoelectroweakprecisionobservablesinthemssm
AT stockingerd twoloopcontributionstoelectroweakprecisionobservablesinthemssm
AT weigleingeorg twoloopcontributionstoelectroweakprecisionobservablesinthemssm
AT heinemeyers twoloopcontributionstoelectroweakprecisionobservablesinthemssm

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