Neutralino decay of MSSM neutral Higgs bosons
Abstract
We compute the oneloop corrected effective Lagrangian for the neutralinoneutralinoneutral Higgs interactions χ_{ℓ}^{0}χ_{k}^{0}H_{m}^{0}. The analysis completes the previous analyses where similar corrections were computed for the fmacr fH_{m}^{0} couplings, where f stands for standard model quarks and leptons and for the charginocharginoneutral Higgs couplings χ_{l}^{+}χ_{k}^{}H_{m}^{0} within the minimal supersymmetric standard model. The effective oneloop 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 χ_{ℓ}^{0}χ_{k}^{0} (ℓ=1, 2, 3, 4; k=1, 2, 3, 4) are investigated and the supersymmetric loop correction is found to be in the range of ∼10% in significant regions of the parameter space. By including the loop corrections of the other decay channels bmacr b, tmacr t, τ¯τ, cmacr c, and χ_{i}^{}χ_{j}^{+} (i=1, 2; j=1, 2), the corrections to branching ratios for H_{m}^{0}→χ_{ℓ}^{0}χ_{k}^{0} 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.
 Publication:

Physical Review D
 Pub Date:
 March 2008
 DOI:
 10.1103/PhysRevD.77.065028
 arXiv:
 arXiv:0803.4134
 Bibcode:
 2008PhRvD..77f5028I
 Keywords:

 12.60.Jv;
 12.60.Fr;
 Supersymmetric models;
 Extensions of electroweak Higgs sector;
 High Energy Physics  Phenomenology
 EPrint:
 31 pages, 11 figures