Equivalence Theorem and Probing the Electroweak Symmetry Breaking Sector

Details Equivalence Theorem and Probing the Electroweak Symmetry Breaking Sector Equivalence Theorem and Probing the Electroweak Symmetry Breaking Sector

1994-10-28

arxiv.org/abs/hep-ph/9410400v2

Phys.Rev.D51:6463-6473,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, in LaTeX, to appear in Phys. Rev. D (1995). A few minor corrections were made to clarify our viewpoint of the Equiva

Scientific paper

10.1103/PhysRevD.51.6463

We examine the Lorentz non-invariance ambiguity in longitudinal weak-boson scatterings and the precise conditions for the validity of the Equivalence Theorem (ET). {\it Safe} Lorentz frames for applying the ET are defined, and the intrinsic connection between the longitudinal weak-boson scatterings and probing the symmetry breaking sector is analyzed. A universal precise formulation of the ET is presented for both the Standard Model and the Chiral Lagrangian formulated Electro-Weak Theories. It is shown that in electroweak theories with strongly interacting symmetry breaking sector, the longitudinal weak-boson scattering amplitude {\it under proper conditions} can be replaced by the corresponding Goldstone-boson scattering amplitude in which all the internal weak-boson lines and fermion loops are ignored.

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