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The electroweak equivalence theorem quantitatively connects the physicalamplitudes of longitudinal massive gauge bosons to those of the corresponding``unphysical'' would-be Goldstone bosons. Its precise form depends on both thegauge fixing condition and the renormalization scheme. Our previousmodification-free schemes have applied to a broad class of $R_\xi$ gaugesincluding 't Hooft-Feynman gauge but excluding Landau gauge. In this paper weconstruct a new renormalization scheme in which the radiative modificationfactor, $C_{mod}^a$, is equal to unity for all $R_\xi$-gauges, including both't Hooft-Feynman and Landau gauges. This scheme makes $C_{mod}^a$ equal tounity by specifying a convenient subtraction condition for the would-beGoldstone boson wavefunction renormalization constant $Z_{\phi^a}$. We buildthe new scheme for both the standard model and the effective Lagrangianformulated electroweak theories (with either linearly or non-linearly realizedsymmetry breaking sector). Based upon these, a new prescription, called``divided equivalence theorem'', is further proposed for extending the highenergy region applicable to the equivalence theorem.Comment: Version to be Published in Phys.Rev.D. 42-page-RevTex including 2  epsf Figs, minor typos correcte

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Equivalence theorem and its radiative-correction-free formulation for all<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>R</mml:mi></mml:mrow><mml:mrow><mml:mi>ξ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>gauges

Equivalence theorem and its radiative-correction-free formulation for allRξgauges