Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-05-16
Phys.Rev. D57 (1998) 100-111
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 2 figures, REVTEX
Scientific paper
10.1103/PhysRevD.57.100
We study a simplified version of the Standard Electroweak Model and introduce the concept of the physical gauge invariant effective potential in terms of matrix elements of the Hamiltonian in physical states. This procedure allows an unambiguous identification of the symmetry breaking order parameter and the resulting effective potential as the energy in a constrained state. We explicitly compute the physical effective potential at one loop order and improve it using the RG. This construction allows us to extract a reliable, gauge invariant bound on the Higgs mass by unambiguously obtaining the scale at which new physics should emerge to preclude vacuum instability. Comparison is made with popular gauge fixing procedures and an ``error'' estimate is provided between the Landau gauge fixed and the gauge invariant results.
Boyanovsky Daniel
Loinaz Will
Willey Raymond S.
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