SUSY contributions to Rb and top quark decay.
نویسندگان
چکیده
Stop contributions to radiative corrections to Rb and the top quark decay are analysed over the relevant MSSM parameter space. One sees a 30% increase in the former along with a similar drop in the latter in going from the higgsino dominated to the mixed region. Consequently one can get a viable SUSY contribution to Rb within the constraint of the top quark data only in the mixed region, corresponding to a photino dominated LSP. We discuss the phenomenological implications of this model for top quark decay and direct stop production, which can be tested with the Tevatron data. Pacs Nos: 12.15.Lk, 14.65.Ha, 14.80.Ly
منابع مشابه
R-parity-breaking SUSY solution to the Rb and ALEPH anomalies.
We discuss an optimal R-parity breaking SUSY solution to the Rb excess as well as the ALEPH 4-jet anomaly. The latter arises from the pair production of stop via chargino decay at LEP1.5, followed by its R–violating decay into a light quark pair. The model satisfies top quark and Z–boson decay constraints along with gaugino mass unification. CERN-TH/96-203 August, 1996 [email protected] dpro...
متن کاملElectroweak Precision Measurements and the Minimal Supersymmetric Standard Model
We discuss supersymmetric contributions to the electroweak precision measurements in the Minimal Supersymmetric Standard Model for two cases: the quark-lepton universality violation δq` in charged currents and the ratio Rb = Γ (Z → bb̄)/Γ (Z → hadrons). The recent experimental data suggest deviations from the Standard Model for these observables, at the 1-σ level for the former and at more than ...
متن کاملFCNC top quark decays in the MSSM: a door to SUSY physics in high luminosity colliders?
We study the FCNC top quark decays t→ c h in the framework of the MSSM, where h ≡ h, H, A is any of the supersymmetric neutral Higgs bosons. We include the leading set of SUSY-QCD and SUSY electroweak contributions. While the FCNC top quark decay into the SM Higgs boson has such a negligible rate that will not be accessible to any presently conceivable accelerator, we find that there is a chanc...
متن کاملFCNC top quark decays: a door to SUSY physics in high luminosity colliders?
We study the FCNC top quark decays t→ c h in the framework of the MSSM, where h ≡ h, H, A is any of the supersymmetric neutral Higgs bosons. We include the leading set of SUSY-QCD and SUSY electroweak contributions. While the FCNC top quark decay into the SM Higgs boson has such a negligible rate that will not be accessible to any presently conceivable accelerator, we find that there is a chanc...
متن کاملThe Quantum Level in the Mssm
We compare the standard top quark decay and the charged Higgs decay of the top quark, t → W b and t → H b, at the quantum level in the MSSM. While the SUSY loop corrections to the standard top quark decay are only of a few percent, it turns out that t → H b is a most promising candidate for carrying large quantum SUSY signatures. As a result, the (tanβ,MH±) exclusion plots presented by the CDF ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review. D, Particles and fields
دوره 54 9 شماره
صفحات -
تاریخ انتشار 1996