Quantum effects on $t\to H^{+}b$ in the MSSM: a window to ``virtual'' supersymmetry?

Abstract

We analyze the one-loop effects (strong and electroweak) on the unconventional top quark decay mode $t\to H^{+}b$ within the MSSM. The results are presented in the on-shell renormalization scheme with a physically well motivated definition of $\tan \beta$. The study of this process at the quantum level is useful to unravel the potential supersymmetric nature of the charged Higgs emerging from that decay. As compared with the standard mode $t\to W^{+}b$, the corrections to $t\to H^{+}b$ are large, slowly decoupling and persist at a sizeable level even for all sparticle masses well above the LEP 200 discovery range. As a matter of fact, the potential size of the SUSY effects, which amount to corrections of several ten percent, could counterbalance the standard QCD corrections and even make them to appear with the ``wrong'' sign. Therefore, if the charged Higgs decay of the top quark is kinematically allowed -a possibility which is not excluded by the recent measurements of the branching ratio $BR(t\to W^{+}b)$ at the Tevatron - it could be an invaluable laboratory to search for ``virtual'' supersymmetry. While a first significant test of these effects could possibly be performed at the upgraded Tevatron, a more precise verification would most likely be carried out in future experiments at the LHC.

arXiv comment60 pages, LaTeX, 25 figs included as a separate file, full postscript version avaliable at ftp://ftp.ifae.es/preprint/ft/uabft397.ps . In this improved version we give an extended discussion of our renormalization framework and of the numerical analysis. Two additional figures are included. Some missprints have been corrected

References in corpus (1)

• Electroweak Top Quark Production at the Fermilab Tevatron

Cited by in corpus (55)

• Effective lagrangian for the tbH^+ interaction in the MSSM and charged Higgs phenomenology
• Higgs Boson Theory and Phenomenology
• $\Delta M_{d,s}$, $B_{d,s}^0\to {\mu }^{+}{\mu }^{-}$ and $B\to X_s\gamma$ in Supersymmetry at Large $\tan \beta$
• FCNC top quark decay in the MSSM: a door to SUSY physics in high luminosity colliders?
• Loop Induced Flavor Changing Neutral Decays of the Top Quark in a General Two-Higgs-Doublet Model
• The effect of H^\pm on B^\pm -> τ^\pm νand B^\pm -> μ^\pm ν
• Gauge-independent Renormalization of the 2-Higgs-Doublet Model
• Charged Higgs- and R-Parity-Violating Slepton-Strahlung at Hadron Colliders
• Gauge dependence and renormalization of $\tan \beta$ in the MSSM
• Distinguishing Higgs models in H -> b b-bar / H -> tau^+ tau^-
• Automatised full one-loop renormalisation of the MSSM II: The chargino-neutralino sector, the sfermion sector and some applications
• Slepton Production at e+e- and e-e- Linear Colliders
• Higgs decays in the Two Higgs Doublet Model: Large quantum effects in the decoupling regime
• Prospects for heavy supersymmetric charged Higgs boson searches at hadron colliders
• Detecting heavy charged Higgs bosons at the LHC with triple b-tagging
• Yukawa-coupling corrections to scalar quark decays
• SUSY induced top quark FCNC decay $t\to ch$ after Run I of LHC
• Associated H${}^{-}$ W${}^{+}$ Production in High Energy $e^{+}{e}^{-}$ Collisions
• Higgs Boson Flavor-Changing Neutral Decays into Top Quark in a General Two-Higgs-Doublet Model
• Fermionic decays of sfermions: a complete discussion at one-loop order
• Prospects for supersymmetric charged Higgs boson discovery at the Tevatron and the LHC
• Full electroweak one-loop radiative corrections to squark decays in the MSSM
• Neutral Higgs-pair production at Linear Colliders within the general 2HDM: quantum effects and triple Higgs boson self-interactions
• Loop effects and non-decoupling property of SUSY QCD in $gb\to t{H}^{-}$
• Associated production of H^{\pm} and W^{\mp} in high-energy e+e- collisions in the Minimal Supersymmetric Standard Model
• Top quark physics at the LHC
• Production and FCNC decay of supersymmetric Higgs bosons into heavy quarks in the LHC
• CP Violation in Top Quark Pair Production at Hadron Colliders
• The Charged Higgs Boson Mass of the MSSM in the Feynman-Diagrammatic Approach
• Delta r in the Two-Higgs-Doublet Model at full one loop level -- and beyond
• Top quark decay into charged Higgs boson in a general Two-Higgs-Doublet model: implications for the TEVATRON data
• FCNC-induced heavy-quark events at the LHC from Supersymmetry
• Higgs boson pair production through gauge boson fusion at linear colliders within the general 2HDM
• Charged Higgs Bosons decays H^\pm \to W^\pm (γ, Z) revisited
• Single Higgs-boson production through gamma-gamma scattering within the general 2HDM
• Higgs-boson production associated with a bottom quark at hadron colliders with SUSY-QCD corrections
• Quantum effects on Higgs-strahlung events at Linear Colliders within the general 2HDM
• Single Charged Higgs Boson Production in Polarized Photon Collision and the Probe of New Physics
• The Search for Supersymmetry at the Tevatron Collider
• Single Higgs-boson production at a photon-photon collider: general 2HDM versus MSSM
• Radiatively corrected lepton energy distributions in top quark decays $t\to b{W}^{+}\to b({\ell }^{+}{\nu }_{\ell })$ and $t\to b{H}^{+}\to b({\tau }^{+}{\nu }_{\tau })$ and single charged prong energy distributions from subsequent ${\tau }^{+}$ decays
• Optimal observables to search for indirect supersymmetric QCD signals in Higgs boson decays
• Higgs phenomenology in the Stealth Doublet Model
• On MSSM charged Higgs boson production in association with an electroweak W boson at electron positron colliders
• Improved sensitivity to charged Higgs searches in Top quark decays $t\to b{H}^{+}\to b({\tau }^{+}{\nu }_{\tau })$ at the LHC using $\tau$ polarisation and multivariate tecnniques
• Supersymmetric radiative corrections at large tan beta
• Supersymmetric effects on heavy charged Higgs boson production in hadron colliders
• Left-Right squarks mixings effects in Charged Higgs Bosons decays $H^{\pm }\to W^{\pm }(\gamma ,Z)$ in the MSSM
• e+e- --> H+ e- nubar in the two-Higgs-doublet model
• Discriminating between SUSY and Non-SUSY Higgs Sectors through the Ratio $H\to b\bar{b}/H\to {\tau }^{+}{\tau }^{-}$ with a 125 GeV Higgs boson
• Fermionic decays of sfermions in the MSSM: a full one-loop calculation
• Quantum SUSY signatures in low and high energy processes
• Charged Higgs-boson production in association with an electron and a neutrino at electron-positron colliders
• QCD and SUSY-QCD corrections to the Three-Body Decay of the Charged Higgs Boson
• Refining two-loop corrections to trilinear Higgs couplings in the Two-Higgs-Doublet Model