2008/03/28 by Tarek Ibrahim
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.77.065028
published as Phys.Rev.D77:065028,2008 · 31 pages, 11 figures
arxiv created 2008/03/28 · openalex publication_date 2008/03/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We compute the one-loop corrected effective Lagrangian for the neutralino-neutralino-neutral Higgs interactions \ensuremathχ_\ensuremathℓ0\ensuremathχk0Hm0. The analysis completes the previous analyses where similar corrections were computed for the ffHm0 couplings, where f stands for standard model quarks and leptons and for the chargino-chargino-neutral Higgs couplings \ensuremathχl+\ensuremathχk^\ensuremath-Hm0 within the minimal supersymmetric standard model. The effective one-loop Lagrangian is then applied to the computation of the neutral Higgs decays. The sizes of the supersymmetric loop corrections of the neutral Higgs decay widths into \ensuremathχ_\ensuremathℓ0\ensuremathχk0 (\ensuremathℓ=1, 2, 3, 4; k=1, 2, 3, 4) are investigated and the supersymmetric loop correction is found to be in the range of \ensuremath∼10% in significant regions of the parameter space. By including the loop corrections of the other decay channels bb, tt, \ensuremathτ\ensuremathτ, cc, and \ensuremathχi^\ensuremath-\ensuremathχj+ (i=1, 2; j=1, 2), the corrections to branching ratios for Hm0\ensuremath→\ensuremathχ_\ensuremathℓ0\ensuremathχk0 can reach as high as 50%. The effects of CP phases on the branching ratio are also investigated. A discussion of the implications of the analysis for colliders is given.