QCD corrections to tb-bar H$^{–}$ associated production in e+e– annihilation

We calculate the QCD corrections to the cross section of e+e–-->tb-bar H– and its charge-conjugate counterpart within the minimal supersymmetric extension of the standard model. This process is particularly important if mt<mH + mb and sqrt(s)<2mH, so that t-->bH+ and e+e–-->H+H– are n...

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Detalles Bibliográficos
Autores principales: Kniehl, Bernd A, Madricardo, Fantina, Steinhauser, Matthias
Lenguaje:eng
Publicado: 2002
Materias:
XX
Acceso en línea:http://cds.cern.ch/record/1035498
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author Kniehl, Bernd A
Madricardo, Fantina
Steinhauser, Matthias
author_facet Kniehl, Bernd A
Madricardo, Fantina
Steinhauser, Matthias
author_sort Kniehl, Bernd A
collection CERN
description We calculate the QCD corrections to the cross section of e+e–-->tb-bar H– and its charge-conjugate counterpart within the minimal supersymmetric extension of the standard model. This process is particularly important if mt<mH + mb and sqrt(s)<2mH, so that t-->bH+ and e+e–-->H+H– are not allowed kinematically. Large logarithmic corrections that arise in the on-mass-shell scheme of quark mass renormalization, especially from the tb-bar H– Yukawa coupling for large values of tan beta, are resummed by adopting the modified minimal-subtraction scheme, so that the convergence behavior of the perturbative expansion is improved. The inclusion of the QCD corrections leads to a significant reduction of the theoretical uncertainties due to scheme and scale dependences.
id cern-1035498
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2002
record_format invenio
spelling cern-10354982019-09-30T06:29:59Zhttp://cds.cern.ch/record/1035498engKniehl, Bernd AMadricardo, FantinaSteinhauser, MatthiasQCD corrections to tb-bar H$^{–}$ associated production in e+e– annihilationXXWe calculate the QCD corrections to the cross section of e+e–-->tb-bar H– and its charge-conjugate counterpart within the minimal supersymmetric extension of the standard model. This process is particularly important if mt<mH + mb and sqrt(s)<2mH, so that t-->bH+ and e+e–-->H+H– are not allowed kinematically. Large logarithmic corrections that arise in the on-mass-shell scheme of quark mass renormalization, especially from the tb-bar H– Yukawa coupling for large values of tan beta, are resummed by adopting the modified minimal-subtraction scheme, so that the convergence behavior of the perturbative expansion is improved. The inclusion of the QCD corrections leads to a significant reduction of the theoretical uncertainties due to scheme and scale dependences.oai:cds.cern.ch:10354982002
spellingShingle XX
Kniehl, Bernd A
Madricardo, Fantina
Steinhauser, Matthias
QCD corrections to tb-bar H$^{–}$ associated production in e+e– annihilation
title QCD corrections to tb-bar H$^{–}$ associated production in e+e– annihilation
title_full QCD corrections to tb-bar H$^{–}$ associated production in e+e– annihilation
title_fullStr QCD corrections to tb-bar H$^{–}$ associated production in e+e– annihilation
title_full_unstemmed QCD corrections to tb-bar H$^{–}$ associated production in e+e– annihilation
title_short QCD corrections to tb-bar H$^{–}$ associated production in e+e– annihilation
title_sort qcd corrections to tb-bar h$^{–}$ associated production in e+e– annihilation
topic XX
url http://cds.cern.ch/record/1035498
work_keys_str_mv AT kniehlbernda qcdcorrectionstotbbarhassociatedproductionineeannihilation
AT madricardofantina qcdcorrectionstotbbarhassociatedproductionineeannihilation
AT steinhausermatthias qcdcorrectionstotbbarhassociatedproductionineeannihilation

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