Effective lagrangian for the $\overline{t}bH^{+}$ interaction in the MSSM and charged Higgs phenomenology

In the framework of a 2HDM effective lagrangian for the MSSM, we analyse some phenomenological implications of the soft SUSY breaking effects that modify the relation between the bottom mass and the bottom Yukawa coupling. We derive a resummation of the dominant supersymmetric corrections for large...

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Detalles Bibliográficos
Autores principales: Carena, Marcela, Garcia, David, Nierste, Ulrich, Wagner, Carlos E.M.
Lenguaje:eng
Publicado: 1999
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(00)00146-2
http://cds.cern.ch/record/413086
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author Carena, Marcela
Garcia, David
Nierste, Ulrich
Wagner, Carlos E.M.
author_facet Carena, Marcela
Garcia, David
Nierste, Ulrich
Wagner, Carlos E.M.
author_sort Carena, Marcela
collection CERN
description In the framework of a 2HDM effective lagrangian for the MSSM, we analyse some phenomenological implications of the soft SUSY breaking effects that modify the relation between the bottom mass and the bottom Yukawa coupling. We derive a resummation of the dominant supersymmetric corrections for large values of \tb to all orders in perturbation theory. With the help of the operator product expansion we also perform the resummation of the leading and next-to-leading logarithms of the standard QCD corrections. We use these resummation procedures to compute the radiative corrections to the t->bH, H->tb decay rates, and we derive simple formulae embodying all the dominant contributions for large \tb values. We also compute the corresponding branching ratios. We show, as an example, the effect of these new results on the region of the \mH-\tb plane excluded by the D0 searches for a supersymmetric charged Higgs boson, as a function of the MSSM parameter space.
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language eng
publishDate 1999
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spelling cern-4130862023-02-04T05:49:53Zdoi:10.1016/S0550-3213(00)00146-2http://cds.cern.ch/record/413086engCarena, MarcelaGarcia, DavidNierste, UlrichWagner, Carlos E.M.Effective lagrangian for the $\overline{t}bH^{+}$ interaction in the MSSM and charged Higgs phenomenologyParticle Physics - PhenomenologyIn the framework of a 2HDM effective lagrangian for the MSSM, we analyse some phenomenological implications of the soft SUSY breaking effects that modify the relation between the bottom mass and the bottom Yukawa coupling. We derive a resummation of the dominant supersymmetric corrections for large values of \tb to all orders in perturbation theory. With the help of the operator product expansion we also perform the resummation of the leading and next-to-leading logarithms of the standard QCD corrections. We use these resummation procedures to compute the radiative corrections to the t->bH, H->tb decay rates, and we derive simple formulae embodying all the dominant contributions for large \tb values. We also compute the corresponding branching ratios. We show, as an example, the effect of these new results on the region of the \mH-\tb plane excluded by the D0 searches for a supersymmetric charged Higgs boson, as a function of the MSSM parameter space.In the framework of a 2HDM effective lagrangian for the MSSM, we analyse important phenomenological aspects associated with quantum soft SUSY-breaking effects that modify the relation between the bottom mass and the bottom Yukawa coupling. We derive a resummation of the dominant supersymmetric corrections for large values of \tb to all orders in perturbation theory. With the help of the operator product expansion we also perform the resummation of the leading and next-to-leading logarithms of the standard QCD corrections. We use these resummation procedures to compute the radiative corrections to the \tbH, \Htb decay rates. In the large \tb regime, we derive simple formulae embodying all the dominant contributions to these decay rates and we compute the corresponding branching ratios. We show, as an example, the effect of these new results on determining the region of the \mH--\tb plane excluded by the Tevatron searches for a supersymmetric charged Higgs boson in top quark decays, as a function of the MSSM parameter space.In the framework of a 2HDM effective lagrangian for the MSSM, we analyse important phenomenological aspects associated with quantum soft SUSY-breaking effects that modify the relation between the bottom mass and the bottom Yukawa coupling. We derive a resummation of the dominant supersymmetric corrections for large values of \tb to all orders in perturbation theory. With the help of the operator product expansion we also perform the resummation of the leading and next-to-leading logarithms of the standard QCD corrections. We use these resummation procedures to compute the radiative corrections to the \tbH, \Htb decay rates. In the large \tb regime, we derive simple formulae embodying all the dominant contributions to these decay rates and we compute the corresponding branching ratios. We show, as an example, the effect of these new results on determining the region of the \mH--\tb plane excluded by the Tevatron searches for a supersymmetric charged Higgs boson in top quark decays, as a function of the MSSM parameter space.In the framework of a 2HDM effective lagrangian for the MSSM, we analyse important phenomenological aspects associated with quantum soft SUSY-breaking effects that modify the relation between the bottom mass and the bottom Yukawa coupling. We derive a resummation of the dominant supersymmetric corrections for large values of \tb to all orders in perturbation theory. With the help of the operator product expansion we also perform the resummation of the leading and next-to-leading logarithms of the standard QCD corrections. We use these resummation procedures to compute the radiative corrections to the \tbH, \Htb decay rates. In the large \tb regime, we derive simple formulae embodying all the dominant contributions to these decay rates and we compute the corresponding branching ratios. We show, as an example, the effect of these new results on determining the region of the \mH--\tb plane excluded by the Tevatron searches for a supersymmetric charged Higgs boson in top quark decays, as a function of the MSSM parameter space.In the framework of a 2HDM effective lagrangian for the MSSM, we analyse important phenomenological aspects associated with quantum soft SUSY-breaking effects that modify the relation between the bottom mass and the bottom Yukawa coupling. We derive a resummation of the dominant supersymmetric corrections for large values of \tb to all orders in perturbation theory. With the help of the operator product expansion we also perform the resummation of the leading and next-to-leading logarithms of the standard QCD corrections. We use these resummation procedures to compute the radiative corrections to the \tbH, \Htb decay rates. In the large \tb regime, we derive simple formulae embodying all the dominant contributions to these decay rates and we compute the corresponding branching ratios. We show, as an example, the effect of these new results on determining the region of the \mH--\tb plane excluded by the Tevatron searches for a supersymmetric charged Higgs boson in top quark decays, as a function of the MSSM parameter space.In the framework of a 2HDM effective lagrangian for the MSSM, we analyse important phenomenological aspects associated with quantum soft SUSY-breaking effects that modify the relation between the bottom mass and the bottom Yukawa coupling. We derive a resummation of the dominant supersymmetric corrections for large values of \tb to all orders in perturbation theory. With the help of the operator product expansion we also perform the resummation of the leading and next-to-leading logarithms of the standard QCD corrections. We use these resummation procedures to compute the radiative corrections to the \tbH, \Htb decay rates. In the large \tb regime, we derive simple formulae embodying all the dominant contributions to these decay rates and we compute the corresponding branching ratios. We show, as an example, the effect of these new results on determining the region of the \mH--\tb plane excluded by the Tevatron searches for a supersymmetric charged Higgs boson in top quark decays, as a function of the MSSM parameter space.In the framework of a 2HDM effective Lagrangian for the MSSM, we analyse important phenomenological aspects associated with quantum soft SUSY-breaking effects that modify the relation between the bottom mass and the bottom Yukawa coupling. We derive a resummation of the dominant supersymmetric corrections for large values of tan β to all orders in perturbation theory. With the help of the operator product expansion we also perform the resummation of the leading and next-to-leading logarithms of the standard QCD corrections. We use these resummation procedures to compute the radiative corrections to the t→b H + , H + →t b ̄ decay rates. In the large tan β regime, we derive simple formulae embodying all the dominant contributions to these decay rates and we compute the corresponding branching ratios. We show, as an example, the effect of these new results on determining the region of the M H + – tan β plane excluded by the Tevatron searches for a supersymmetric charged Higgs boson in top quark decays, as a function of the MSSM parameter space.hep-ph/9912516FERMILAB-PUB-99-367-TCERN-TH-2000-009CERN-TH-2000-009FERMILAB-PUB-99-367-Toai:cds.cern.ch:4130861999-12-28
spellingShingle Particle Physics - Phenomenology
Carena, Marcela
Garcia, David
Nierste, Ulrich
Wagner, Carlos E.M.
Effective lagrangian for the $\overline{t}bH^{+}$ interaction in the MSSM and charged Higgs phenomenology
title Effective lagrangian for the $\overline{t}bH^{+}$ interaction in the MSSM and charged Higgs phenomenology
title_full Effective lagrangian for the $\overline{t}bH^{+}$ interaction in the MSSM and charged Higgs phenomenology
title_fullStr Effective lagrangian for the $\overline{t}bH^{+}$ interaction in the MSSM and charged Higgs phenomenology
title_full_unstemmed Effective lagrangian for the $\overline{t}bH^{+}$ interaction in the MSSM and charged Higgs phenomenology
title_short Effective lagrangian for the $\overline{t}bH^{+}$ interaction in the MSSM and charged Higgs phenomenology
title_sort effective lagrangian for the $\overline{t}bh^{+}$ interaction in the mssm and charged higgs phenomenology
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0550-3213(00)00146-2
http://cds.cern.ch/record/413086
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AT garciadavid effectivelagrangianfortheoverlinetbhinteractioninthemssmandchargedhiggsphenomenology
AT niersteulrich effectivelagrangianfortheoverlinetbhinteractioninthemssmandchargedhiggsphenomenology
AT wagnercarlosem effectivelagrangianfortheoverlinetbhinteractioninthemssmandchargedhiggsphenomenology

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