Abstract

The supersymmetric QCD and the supersymmetric electroweak loop corrections to the violations of weak isospin to Yukawa couplings are investigated. Specifically it involves an analysis of the supersymmetric (SUSY) loop corrections to the Higgs couplings to the third generation quarks and leptons. Here we analyze the SUSY loop corrections to the charged Higgs couplings which are then compared with the supersymmetric loop corrections to the neutral Higgs couplings previously computed. It is found that the weak isospin violations can be quite significant, i.e., as much as 40–50% or more of the total loop correction to the Yukawa coupling. The effects of CP phases are also studied and it is found that these effects can either enhance or suppress the weak isospin violations. We also investigate the weak isospin violation effects on the branching ratio BR(H-→t̅ b)/BR(H-→ν̅ ττ-) and show that the effects are sensitive to CP phases. Thus an accurate measurement of this branching ratio along with the branching ratio of the neutral Higgs boson decays can provide a measure of weak isospin violation along with providing a clue to the presence of supersymmetry.

Notes

Originally published in Physical Review D v.69 (2004): 075001. DOI: 10.1103/PhysRevD.69.075001

Keywords

isospin violations, Higgs couplings, supersymmetric QCD, supersymmetric electroweak corrections

Subject Categories

Supersymmetry, Isobaric spin

Disciplines

Physics

Publisher

American Physical Society

Publication Date

4-2-2004

Rights Information

Copyright (2004) American Physical Society

Rights Holder

American Physical Society


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