Supersymmetric QCD corrections to the minimal supersymmetric standard model h^{0}bb¯ vertex in the decoupling limit
Abstract
We analyze the supersymmetric (SUSY) QCD contribution to the h^{0}bb¯ coupling at one loop in the minimal supersymmetric standard model in the decoupling limit. Analytic expressions in the large SUSY mass region are derived and the decoupling behavior of the corrections is examined in various limiting cases, where some or all of the SUSY mass parameters become large. We show that in the decoupling limit of large SUSY mass parameters and large CPodd Higgs boson mass, the h^{0}bb¯ coupling approaches its standard model value at one loop. However, the onset of decoupling is delayed when tan β is large. In addition, the oneloop SUSYQCD corrections decouple if the masses of either the bottom squarks or the gluino are separately taken large; although the approach to decoupling is significantly slower in the latter case.
 Publication:

Physical Review D
 Pub Date:
 March 2001
 DOI:
 10.1103/PhysRevD.63.055004
 arXiv:
 arXiv:hepph/0007006
 Bibcode:
 2001PhRvD..63e5004H
 Keywords:

 14.80.Cp;
 12.38.Bx;
 12.60.Jv;
 14.80.Ly;
 Nonstandardmodel Higgs bosons;
 Perturbative calculations;
 Supersymmetric models;
 Supersymmetric partners of known particles;
 High Energy Physics  Phenomenology
 EPrint:
 27 pages, 7 figures and 1 table in LaTeX2e format