Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-05-04
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 3 figures
Scientific paper
The scale invariant of the effective potential of the standard model at two-loop is used as a boundary condition under the assumption that the two-loop effective potential approximates the full effective potential. This condition leads with the help of the renormalization group functions of the model at two-loop to an algebraic equation of the scalar self coupling with coefficients that depend on the gauge and the top quark couplings. It admits only two real positive solutions. One of them, in the absence of the gauge and top quark couplings, corresponds to the non-perturbative ultraviolet fixed point of the scalar renormalization group function and the other corresponds to the perturbative infrared fixed point. The dependence of the scalar coupling on the top quark and the strong couplings at two-loop radiative corrections is analyzed.
Alhendi H. A.
Barakat Thabit
Loqman Gh. I.
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