One-loop Radiative Corrections to the ρ Parameter in the Left Right Twin Higgs Model
نویسندگان
چکیده
We implement a one-loop analysis of the ρ parameter in the Left Right Twin Higgs model, including the logarithmically enhanced contributions from both fermion and scalar loops. Numerical results show that the one-loop contributions are dominant over the tree level corrections in most regions of parameter space. The experimentally allowed values of ρ-parameter divide the allowed parameter space into two regions; less than 670 GeV and larger than 1100 GeV roughly, for symmetry breaking scale f . Our numerical results significantly reduce the parameter space which are favorably accessible to the LHC.
منابع مشابه
Twin Higgs Model
We implement a one-loop analysis of the ρ parameter in the Left Right Twin Higgs model, including the logarithmically enhanced contributions from both fermion and scalar loops. Numerical results show that the one-loop contributions are dominant over the tree level corrections in most regions of parameter space. The experimentally allowed values of ρ-parameter divide the allowed parameter space ...
متن کاملTop Radiative Corrections in Non-minimal Standard Models
We derive the one-loop effective action induced by a heavy top in models with an extended Higgs sector. We use the effective action to analyze the top corrections to the ρ parameter and to the Higgs-gauge boson couplings. We show that in models with ρ 6= 1 at tree-level, one does not lose generally the bound on mt from the ρ parameter.
متن کاملThe Littlest Higgs Model and One-Loop Electroweak Precision Constraints
We present in this talk the one-loop electroweak precision constraints in the Littlest Higgs model, including the logarithmically enhanced contributions from both fermion and scalar loops. We find the one-loop contributions are comparable to the tree level corrections in some regions of parameter space. A low cutoff scale is allowed for a non-zero triplet VEV. Constraints on various other param...
متن کاملComplete Two-loop Dominant Corrections to the Mass of the Lightest CP-even Higgs Boson in the Minimal Supersymmetric Standard Model
Using an effective potential approach, we compute two-loop radiative corrections to the MSSM lightest CP-even Higgs boson mass Mh0 to O(α2 t ) for arbitrary left-right top-squark mixing and tanβ. We find that these corrections can increase Mh0 by as much as 5 GeV; assuming a SUSY scale of 1 TeV, the upper bound on the Higgs boson mass is Mh0 ≈ 129 ± 5 GeV for the top quark pole mass 175 ± 5 GeV...
متن کاملThree - loop electroweak corrections to the ρ - parameter , sin 2 θ lept eff and the W - boson mass in the large Higgs mass limit 1
Three-loop electroweak corrections to the ρ-parameter, sin 2 θ lept eff and the W-boson mass in the large Higgs mass limit 1 A review of the calculation of the leading three-loop electroweak corrections to the ρ-parameter, sin 2 θ lept eff and the W-boson mass is presented. The heavy Higgs mass expansion and the renormalization are discussed.
متن کامل