QCD Corrections to $t\overline{b}H^{-}$ Associated Production in $e^{+}e^{-}$ Annihilation

We calculate the QCD corrections to the cross section of e^+ e^- -> t anti-b H^- and its charge-conjugate counterpart within the minimal supersymmetric extension of the Standard Model. This process is particularly important if m_t < m_H + m_b and root(s) < 2 m_H, so that t -> b H^+ and e...

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Detalles Bibliográficos
Autores principales: Kniehl, Bernd A., Madricardo, Fantina, Steinhauser, Matthias
Lenguaje:eng
Publicado: 2002
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.66.054016
http://cds.cern.ch/record/555146
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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^- -> t anti-b H^- and its charge-conjugate counterpart within the minimal supersymmetric extension of the Standard Model. This process is particularly important if m_t < m_H + m_b and root(s) < 2 m_H, so that t -> b H^+ and e^+ e^- -> H^+ H^- are not allowed kinematically. Depending on tan(beta) and m_H, the corrections can be of either sign. For large tan(beta), they lead to a dramatic reduction of the cross section, by more than 50%.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2002
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spelling cern-5551462023-03-14T16:59:54Zdoi:10.1103/PhysRevD.66.054016http://cds.cern.ch/record/555146engKniehl, Bernd A.Madricardo, FantinaSteinhauser, MatthiasQCD Corrections to $t\overline{b}H^{-}$ Associated Production in $e^{+}e^{-}$ AnnihilationParticle Physics - PhenomenologyWe calculate the QCD corrections to the cross section of e^+ e^- -> t anti-b H^- and its charge-conjugate counterpart within the minimal supersymmetric extension of the Standard Model. This process is particularly important if m_t < m_H + m_b and root(s) < 2 m_H, so that t -> b H^+ and e^+ e^- -> H^+ H^- are not allowed kinematically. Depending on tan(beta) and m_H, the corrections can be of either sign. For large tan(beta), they lead to a dramatic reduction of the cross section, by more than 50%.We calculate the QCD corrections to the cross section of e^+ e^- -&gt; t anti-b H^- and its charge-conjugate counterpart within the minimal supersymmetric extension of the Standard Model. This process is particularly important if m_t &lt; m_H + m_b and root(s) &lt; 2 m_H, so that t -&gt; b H^+ and e^+ e^- -&gt; H^+ H^- are not allowed kinematically. Large logarithmic corrections that arise in the on-mass-shell scheme of quark mass renormalization, especially from the t anti-b 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.hep-ph/0205312CERN-TH-2002-095DESY-02-057CERN-TH-2002-095DESY-02-057DESY-2002-057oai:cds.cern.ch:5551462002-05-28
spellingShingle Particle Physics - Phenomenology
Kniehl, Bernd A.
Madricardo, Fantina
Steinhauser, Matthias
QCD Corrections to $t\overline{b}H^{-}$ Associated Production in $e^{+}e^{-}$ Annihilation
title QCD Corrections to $t\overline{b}H^{-}$ Associated Production in $e^{+}e^{-}$ Annihilation
title_full QCD Corrections to $t\overline{b}H^{-}$ Associated Production in $e^{+}e^{-}$ Annihilation
title_fullStr QCD Corrections to $t\overline{b}H^{-}$ Associated Production in $e^{+}e^{-}$ Annihilation
title_full_unstemmed QCD Corrections to $t\overline{b}H^{-}$ Associated Production in $e^{+}e^{-}$ Annihilation
title_short QCD Corrections to $t\overline{b}H^{-}$ Associated Production in $e^{+}e^{-}$ Annihilation
title_sort qcd corrections to $t\overline{b}h^{-}$ associated production in $e^{+}e^{-}$ annihilation
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.66.054016
http://cds.cern.ch/record/555146
work_keys_str_mv AT kniehlbernda qcdcorrectionstotoverlinebhassociatedproductionineeannihilation
AT madricardofantina qcdcorrectionstotoverlinebhassociatedproductionineeannihilation
AT steinhausermatthias qcdcorrectionstotoverlinebhassociatedproductionineeannihilation

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