Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-12-21
Phys.Atom.Nucl. 64 (2001) 1513-1530; Yad.Fiz. 64 (2001) 1589-1606
Physics
High Energy Physics
High Energy Physics - Phenomenology
35 pages, 9 figures included; LaTeX2e
Scientific paper
10.1134/1.1398945
In the strong Yukawa coupling limit the renormalization of trilinear couplings $A_i(t)$ and combinations of the scalar particle masses $\mathfrak{M}_i^2(t)$ are studied in the framework of the Next--to--Minimal SUSY Model. The dependence of given parameters on their initial values at the Grand Unification scale disappears when the solutions of the renormalization group equations approach the infrared quasi fixed points. Besides that at $\tilde{\alpha}_{\text{GUT}}\ll Y_i(0)\ll 1$ in the vicinity of quasi fixed points $A_i(t)$ and $\mathfrak{M}_i^2(t)$ concentrated near lines or surfaces in the soft SUSY breaking parameter space. It occurs because the dependence of trilinear couplings and combinations of scalar particle mass on $A_i(0)$ and $\mathfrak{M}_i^2(0)$ disappears rather weakly. We propose a method which enables to obtain equations for such lines and surfaces. Their origin is also discussed by means of exact and approximate solutions of the NMSSM renormalization group equations.
Nevzorov R. B.
Trusov M. A.
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